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Finding the Fourth Proportional to 315,998.40, 473,824.80 and 128,798.40

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Solution

The fourth proportional to 315,998.40, 473,824.80 and 128,798.40 is: 193,127.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,998.40 : 473,824.80 = 128,798.40 : x
  2. Step 2: Convert to fraction form
    315,998.40/473,824.80 = 128,798.40/x
  3. Step 3: Cross multiply
    315,998.40x = 473,824.80 × 128,798.40
  4. Step 4: Simplify right side
    315,998.40x = 61,027,876,120.32
  5. Step 5: Solve for x
    x = 61,027,876,120.32/315,998.40
  6. Step 6: Final answer
    x = 193,127.17

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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.