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Finding the Fourth Proportional to 631,018.46, 870,840.78 and 344,565.20

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Solution

The fourth proportional to 631,018.46, 870,840.78 and 344,565.20 is: 475,519.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,018.46 : 870,840.78 = 344,565.20 : x
  2. Step 2: Convert to fraction form
    631,018.46/870,840.78 = 344,565.20/x
  3. Step 3: Cross multiply
    631,018.46x = 870,840.78 × 344,565.20
  4. Step 4: Simplify right side
    631,018.46x = 300,061,427,528.86
  5. Step 5: Solve for x
    x = 300,061,427,528.86/631,018.46
  6. Step 6: Final answer
    x = 475,519.25

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Double scale
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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.