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Finding the Fourth Proportional to 688.96, 1,032.72 and 545.44

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Solution

The fourth proportional to 688.96, 1,032.72 and 545.44 is: 817.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.96 : 1,032.72 = 545.44 : x
  2. Step 2: Convert to fraction form
    688.96/1,032.72 = 545.44/x
  3. Step 3: Cross multiply
    688.96x = 1,032.72 × 545.44
  4. Step 4: Simplify right side
    688.96x = 563,286.80
  5. Step 5: Solve for x
    x = 563,286.80/688.96
  6. Step 6: Final answer
    x = 817.59

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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.