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Finding the Fourth Proportional to 485,513.20, 726,520.20 and 328,049.20

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Solution

The fourth proportional to 485,513.20, 726,520.20 and 328,049.20 is: 490,891.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,513.20 : 726,520.20 = 328,049.20 : x
  2. Step 2: Convert to fraction form
    485,513.20/726,520.20 = 328,049.20/x
  3. Step 3: Cross multiply
    485,513.20x = 726,520.20 × 328,049.20
  4. Step 4: Simplify right side
    485,513.20x = 238,334,370,393.84
  5. Step 5: Solve for x
    x = 238,334,370,393.84/485,513.20
  6. Step 6: Final answer
    x = 490,891.64

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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.