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Finding the Fourth Proportional to 390,755.35, 539,246.19 and 229,613.95

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Solution

The fourth proportional to 390,755.35, 539,246.19 and 229,613.95 is: 316,869.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,755.35 : 539,246.19 = 229,613.95 : x
  2. Step 2: Convert to fraction form
    390,755.35/539,246.19 = 229,613.95/x
  3. Step 3: Cross multiply
    390,755.35x = 539,246.19 × 229,613.95
  4. Step 4: Simplify right side
    390,755.35x = 123,818,447,708.35
  5. Step 5: Solve for x
    x = 123,818,447,708.35/390,755.35
  6. Step 6: Final answer
    x = 316,869.49

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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.