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Finding the Fourth Proportional to 485,520.38, 728,280.56 and 153,096.38

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Solution

The fourth proportional to 485,520.38, 728,280.56 and 153,096.38 is: 229,644.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,520.38 : 728,280.56 = 153,096.38 : x
  2. Step 2: Convert to fraction form
    485,520.38/728,280.56 = 153,096.38/x
  3. Step 3: Cross multiply
    485,520.38x = 728,280.56 × 153,096.38
  4. Step 4: Simplify right side
    485,520.38x = 111,497,117,360.37
  5. Step 5: Solve for x
    x = 111,497,117,360.37/485,520.38
  6. Step 6: Final answer
    x = 229,644.57

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Double scale
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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.