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Finding the Fourth Proportional to 485,770.80, 728,656.20 and 148,810.80

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Solution

The fourth proportional to 485,770.80, 728,656.20 and 148,810.80 is: 223,216.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,770.80 : 728,656.20 = 148,810.80 : x
  2. Step 2: Convert to fraction form
    485,770.80/728,656.20 = 148,810.80/x
  3. Step 3: Cross multiply
    485,770.80x = 728,656.20 × 148,810.80
  4. Step 4: Simplify right side
    485,770.80x = 108,431,912,046.96
  5. Step 5: Solve for x
    x = 108,431,912,046.96/485,770.80
  6. Step 6: Final answer
    x = 223,216.20

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Similar ratio
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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.