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Finding the Fourth Proportional to 485,809.68, 728,736.39 and 148,825.83

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Solution

The fourth proportional to 485,809.68, 728,736.39 and 148,825.83 is: 223,245.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,809.68 : 728,736.39 = 148,825.83 : x
  2. Step 2: Convert to fraction form
    485,809.68/728,736.39 = 148,825.83/x
  3. Step 3: Cross multiply
    485,809.68x = 728,736.39 × 148,825.83
  4. Step 4: Simplify right side
    485,809.68x = 108,454,798,092.95
  5. Step 5: Solve for x
    x = 108,454,798,092.95/485,809.68
  6. Step 6: Final answer
    x = 223,245.44

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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.