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Finding the Fourth Proportional to 485,813.70, 728,720.55 and 170,229.60

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Solution

The fourth proportional to 485,813.70, 728,720.55 and 170,229.60 is: 255,344.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,813.70 : 728,720.55 = 170,229.60 : x
  2. Step 2: Convert to fraction form
    485,813.70/728,720.55 = 170,229.60/x
  3. Step 3: Cross multiply
    485,813.70x = 728,720.55 × 170,229.60
  4. Step 4: Simplify right side
    485,813.70x = 124,049,807,738.28
  5. Step 5: Solve for x
    x = 124,049,807,738.28/485,813.70
  6. Step 6: Final answer
    x = 255,344.40

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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.