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Finding the Fourth Proportional to 1,281,233,906.20, 1,921,850,859.30 and 870,063,909.40

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Solution

The fourth proportional to 1,281,233,906.20, 1,921,850,859.30 and 870,063,909.40 is: 1,305,095,864.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,233,906.20 : 1,921,850,859.30 = 870,063,909.40 : x
  2. Step 2: Convert to fraction form
    1,281,233,906.20/1,921,850,859.30 = 870,063,909.40/x
  3. Step 3: Cross multiply
    1,281,233,906.20x = 1,921,850,859.30 × 870,063,909.40
  4. Step 4: Simplify right side
    1,281,233,906.20x = 1,672,133,071,926,307,328
  5. Step 5: Solve for x
    x = 1,672,133,071,926,307,328/1,281,233,906.20
  6. Step 6: Final answer
    x = 1,305,095,864.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.