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Finding the Fourth Proportional to 485,500.78, 728,338.67 and 148,535.11

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Solution

The fourth proportional to 485,500.78, 728,338.67 and 148,535.11 is: 222,829.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,500.78 : 728,338.67 = 148,535.11 : x
  2. Step 2: Convert to fraction form
    485,500.78/728,338.67 = 148,535.11/x
  3. Step 3: Cross multiply
    485,500.78x = 728,338.67 × 148,535.11
  4. Step 4: Simplify right side
    485,500.78x = 108,183,860,081.34
  5. Step 5: Solve for x
    x = 108,183,860,081.34/485,500.78
  6. Step 6: Final answer
    x = 222,829.43

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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.