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Finding the Fourth Proportional to 693,695.20, 1,040,737.20 and 338,720.80

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Solution

The fourth proportional to 693,695.20, 1,040,737.20 and 338,720.80 is: 508,176.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,695.20 : 1,040,737.20 = 338,720.80 : x
  2. Step 2: Convert to fraction form
    693,695.20/1,040,737.20 = 338,720.80/x
  3. Step 3: Cross multiply
    693,695.20x = 1,040,737.20 × 338,720.80
  4. Step 4: Simplify right side
    693,695.20x = 352,519,336,973.76
  5. Step 5: Solve for x
    x = 352,519,336,973.76/693,695.20
  6. Step 6: Final answer
    x = 508,176.12

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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.