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Finding the Fourth Proportional to 485,364.90, 728,047.35 and 130,414.80

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Solution

The fourth proportional to 485,364.90, 728,047.35 and 130,414.80 is: 195,622.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,364.90 : 728,047.35 = 130,414.80 : x
  2. Step 2: Convert to fraction form
    485,364.90/728,047.35 = 130,414.80/x
  3. Step 3: Cross multiply
    485,364.90x = 728,047.35 × 130,414.80
  4. Step 4: Simplify right side
    485,364.90x = 94,948,149,540.78
  5. Step 5: Solve for x
    x = 94,948,149,540.78/485,364.90
  6. Step 6: Final answer
    x = 195,622.20

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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.