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Finding the Fourth Proportional to 717,849, 990,652.10 and 399,917.48

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Solution

The fourth proportional to 717,849, 990,652.10 and 399,917.48 is: 551,897.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,849 : 990,652.10 = 399,917.48 : x
  2. Step 2: Convert to fraction form
    717,849/990,652.10 = 399,917.48/x
  3. Step 3: Cross multiply
    717,849x = 990,652.10 × 399,917.48
  4. Step 4: Simplify right side
    717,849x = 396,179,091,388.71
  5. Step 5: Solve for x
    x = 396,179,091,388.71/717,849
  6. Step 6: Final answer
    x = 551,897.53

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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.