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Finding the Fourth Proportional to 688.42, 1,032.72 and 363.81

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Solution

The fourth proportional to 688.42, 1,032.72 and 363.81 is: 545.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.42 : 1,032.72 = 363.81 : x
  2. Step 2: Convert to fraction form
    688.42/1,032.72 = 363.81/x
  3. Step 3: Cross multiply
    688.42x = 1,032.72 × 363.81
  4. Step 4: Simplify right side
    688.42x = 375,707.79
  5. Step 5: Solve for x
    x = 375,707.79/688.42
  6. Step 6: Final answer
    x = 545.76

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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.