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Finding the Fourth Proportional to 485,725.20, 728,587.80 and 170,141.10

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Solution

The fourth proportional to 485,725.20, 728,587.80 and 170,141.10 is: 255,211.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,725.20 : 728,587.80 = 170,141.10 : x
  2. Step 2: Convert to fraction form
    485,725.20/728,587.80 = 170,141.10/x
  3. Step 3: Cross multiply
    485,725.20x = 728,587.80 × 170,141.10
  4. Step 4: Simplify right side
    485,725.20x = 123,962,729,738.58
  5. Step 5: Solve for x
    x = 123,962,729,738.58/485,725.20
  6. Step 6: Final answer
    x = 255,211.65

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Similar ratio
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1.5x scale

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.