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Finding the Fourth Proportional to 485,417.20, 728,125.80 and 275,465.20

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Solution

The fourth proportional to 485,417.20, 728,125.80 and 275,465.20 is: 413,197.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,417.20 : 728,125.80 = 275,465.20 : x
  2. Step 2: Convert to fraction form
    485,417.20/728,125.80 = 275,465.20/x
  3. Step 3: Cross multiply
    485,417.20x = 728,125.80 × 275,465.20
  4. Step 4: Simplify right side
    485,417.20x = 200,573,319,122.16
  5. Step 5: Solve for x
    x = 200,573,319,122.16/485,417.20
  6. Step 6: Final answer
    x = 413,197.80

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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.