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Finding the Fourth Proportional to 658,140.71, 908,295.05 and 399,958.07

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Solution

The fourth proportional to 658,140.71, 908,295.05 and 399,958.07 is: 551,979.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,140.71 : 908,295.05 = 399,958.07 : x
  2. Step 2: Convert to fraction form
    658,140.71/908,295.05 = 399,958.07/x
  3. Step 3: Cross multiply
    658,140.71x = 908,295.05 × 399,958.07
  4. Step 4: Simplify right side
    658,140.71x = 363,279,931,646.97
  5. Step 5: Solve for x
    x = 363,279,931,646.97/658,140.71
  6. Step 6: Final answer
    x = 551,979.13

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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.