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Finding the Fourth Proportional to 485,785.20, 728,143.20 and 170,079.60

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Solution

The fourth proportional to 485,785.20, 728,143.20 and 170,079.60 is: 254,932.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,785.20 : 728,143.20 = 170,079.60 : x
  2. Step 2: Convert to fraction form
    485,785.20/728,143.20 = 170,079.60/x
  3. Step 3: Cross multiply
    485,785.20x = 728,143.20 × 170,079.60
  4. Step 4: Simplify right side
    485,785.20x = 123,842,304,198.72
  5. Step 5: Solve for x
    x = 123,842,304,198.72/485,785.20
  6. Step 6: Final answer
    x = 254,932.23

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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.