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Finding the Fourth Proportional to 485,719.20, 728,578.80 and 153,295.20

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Solution

The fourth proportional to 485,719.20, 728,578.80 and 153,295.20 is: 229,942.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,719.20 : 728,578.80 = 153,295.20 : x
  2. Step 2: Convert to fraction form
    485,719.20/728,578.80 = 153,295.20/x
  3. Step 3: Cross multiply
    485,719.20x = 728,578.80 × 153,295.20
  4. Step 4: Simplify right side
    485,719.20x = 111,687,632,861.76
  5. Step 5: Solve for x
    x = 111,687,632,861.76/485,719.20
  6. Step 6: Final answer
    x = 229,942.80

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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.