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Finding the Fourth Proportional to 485,520.26, 728,280.38 and 153,096.26

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Solution

The fourth proportional to 485,520.26, 728,280.38 and 153,096.26 is: 229,644.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,520.26 : 728,280.38 = 153,096.26 : x
  2. Step 2: Convert to fraction form
    485,520.26/728,280.38 = 153,096.26/x
  3. Step 3: Cross multiply
    485,520.26x = 728,280.38 × 153,096.26
  4. Step 4: Simplify right side
    485,520.26x = 111,497,002,409.38
  5. Step 5: Solve for x
    x = 111,497,002,409.38/485,520.26
  6. Step 6: Final answer
    x = 229,644.39

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Half scale
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Double scale
Find fourth proportional to 485,521.26, 728,281.88 and 153,097.26
Similar ratio
Find fourth proportional to 728,280.39, 1,092,420.57 and 229,644.39
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.