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Finding the Fourth Proportional to 485,600.80, 728,401.20 and 148,640.80

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Solution

The fourth proportional to 485,600.80, 728,401.20 and 148,640.80 is: 222,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,600.80 : 728,401.20 = 148,640.80 : x
  2. Step 2: Convert to fraction form
    485,600.80/728,401.20 = 148,640.80/x
  3. Step 3: Cross multiply
    485,600.80x = 728,401.20 × 148,640.80
  4. Step 4: Simplify right side
    485,600.80x = 108,270,137,088.96
  5. Step 5: Solve for x
    x = 108,270,137,088.96/485,600.80
  6. Step 6: Final answer
    x = 222,961.20

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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.