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Finding the Fourth Proportional to 485,265.70, 727,920.15 and 165,412.90

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Solution

The fourth proportional to 485,265.70, 727,920.15 and 165,412.90 is: 248,126.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,265.70 : 727,920.15 = 165,412.90 : x
  2. Step 2: Convert to fraction form
    485,265.70/727,920.15 = 165,412.90/x
  3. Step 3: Cross multiply
    485,265.70x = 727,920.15 × 165,412.90
  4. Step 4: Simplify right side
    485,265.70x = 120,407,382,979.94
  5. Step 5: Solve for x
    x = 120,407,382,979.94/485,265.70
  6. Step 6: Final answer
    x = 248,126.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.