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Finding the Fourth Proportional to 452,805.20, 679,207.80 and 137,221.10

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Solution

The fourth proportional to 452,805.20, 679,207.80 and 137,221.10 is: 205,831.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,805.20 : 679,207.80 = 137,221.10 : x
  2. Step 2: Convert to fraction form
    452,805.20/679,207.80 = 137,221.10/x
  3. Step 3: Cross multiply
    452,805.20x = 679,207.80 × 137,221.10
  4. Step 4: Simplify right side
    452,805.20x = 93,201,641,444.58
  5. Step 5: Solve for x
    x = 93,201,641,444.58/452,805.20
  6. Step 6: Final answer
    x = 205,831.65

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Similar ratio
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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.