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Finding the Fourth Proportional to 386,251.50, 532,909.71 and 243,154.38

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Solution

The fourth proportional to 386,251.50, 532,909.71 and 243,154.38 is: 335,479.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,251.50 : 532,909.71 = 243,154.38 : x
  2. Step 2: Convert to fraction form
    386,251.50/532,909.71 = 243,154.38/x
  3. Step 3: Cross multiply
    386,251.50x = 532,909.71 × 243,154.38
  4. Step 4: Simplify right side
    386,251.50x = 129,579,330,131.03
  5. Step 5: Solve for x
    x = 129,579,330,131.03/386,251.50
  6. Step 6: Final answer
    x = 335,479.16

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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.