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Finding the Fourth Proportional to 688.38, 1,032.84 and 363.60

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Solution

The fourth proportional to 688.38, 1,032.84 and 363.60 is: 545.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.38 : 1,032.84 = 363.60 : x
  2. Step 2: Convert to fraction form
    688.38/1,032.84 = 363.60/x
  3. Step 3: Cross multiply
    688.38x = 1,032.84 × 363.60
  4. Step 4: Simplify right side
    688.38x = 375,540.62
  5. Step 5: Solve for x
    x = 375,540.62/688.38
  6. Step 6: Final answer
    x = 545.54

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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.