Home / 811,921.20-1,217,881.80-251,012.40

Finding the Fourth Proportional to 811,921.20, 1,217,881.80 and 251,012.40

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Solution

The fourth proportional to 811,921.20, 1,217,881.80 and 251,012.40 is: 376,518.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,921.20 : 1,217,881.80 = 251,012.40 : x
  2. Step 2: Convert to fraction form
    811,921.20/1,217,881.80 = 251,012.40/x
  3. Step 3: Cross multiply
    811,921.20x = 1,217,881.80 × 251,012.40
  4. Step 4: Simplify right side
    811,921.20x = 305,703,433,534.32
  5. Step 5: Solve for x
    x = 305,703,433,534.32/811,921.20
  6. Step 6: Final answer
    x = 376,518.60

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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.