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Finding the Fourth Proportional to 658,016.68, 908,080.50 and 399,805.96

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Solution

The fourth proportional to 658,016.68, 908,080.50 and 399,805.96 is: 551,742.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,016.68 : 908,080.50 = 399,805.96 : x
  2. Step 2: Convert to fraction form
    658,016.68/908,080.50 = 399,805.96/x
  3. Step 3: Cross multiply
    658,016.68x = 908,080.50 × 399,805.96
  4. Step 4: Simplify right side
    658,016.68x = 363,055,996,059.78
  5. Step 5: Solve for x
    x = 363,055,996,059.78/658,016.68
  6. Step 6: Final answer
    x = 551,742.85

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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.