Home / 485,138.70-727,708.05-272,562.30

Finding the Fourth Proportional to 485,138.70, 727,708.05 and 272,562.30

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Solution

The fourth proportional to 485,138.70, 727,708.05 and 272,562.30 is: 408,843.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,138.70 : 727,708.05 = 272,562.30 : x
  2. Step 2: Convert to fraction form
    485,138.70/727,708.05 = 272,562.30/x
  3. Step 3: Cross multiply
    485,138.70x = 727,708.05 × 272,562.30
  4. Step 4: Simplify right side
    485,138.70x = 198,345,779,836.52
  5. Step 5: Solve for x
    x = 198,345,779,836.52/485,138.70
  6. Step 6: Final answer
    x = 408,843.45

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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.