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Finding the Fourth Proportional to 485,747.20, 728,491.20 and 170,171.20

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Solution

The fourth proportional to 485,747.20, 728,491.20 and 170,171.20 is: 255,211.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,747.20 : 728,491.20 = 170,171.20 : x
  2. Step 2: Convert to fraction form
    485,747.20/728,491.20 = 170,171.20/x
  3. Step 3: Cross multiply
    485,747.20x = 728,491.20 × 170,171.20
  4. Step 4: Simplify right side
    485,747.20x = 123,968,221,693.44
  5. Step 5: Solve for x
    x = 123,968,221,693.44/485,747.20
  6. Step 6: Final answer
    x = 255,211.40

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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.