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Finding the Fourth Proportional to 631,240.32, 871,116.48 and 344,755.20

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Solution

The fourth proportional to 631,240.32, 871,116.48 and 344,755.20 is: 475,764.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,240.32 : 871,116.48 = 344,755.20 : x
  2. Step 2: Convert to fraction form
    631,240.32/871,116.48 = 344,755.20/x
  3. Step 3: Cross multiply
    631,240.32x = 871,116.48 × 344,755.20
  4. Step 4: Simplify right side
    631,240.32x = 300,321,936,285.70
  5. Step 5: Solve for x
    x = 300,321,936,285.70/631,240.32
  6. Step 6: Final answer
    x = 475,764.82

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.