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Finding the Fourth Proportional to 485,065.70, 727,598.55 and 408,083.30

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Solution

The fourth proportional to 485,065.70, 727,598.55 and 408,083.30 is: 612,124.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,065.70 : 727,598.55 = 408,083.30 : x
  2. Step 2: Convert to fraction form
    485,065.70/727,598.55 = 408,083.30/x
  3. Step 3: Cross multiply
    485,065.70x = 727,598.55 × 408,083.30
  4. Step 4: Simplify right side
    485,065.70x = 296,920,817,359.22
  5. Step 5: Solve for x
    x = 296,920,817,359.22/485,065.70
  6. Step 6: Final answer
    x = 612,124.95

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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.