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Finding the Fourth Proportional to 697.72, 1,045.96 and 542.81

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Solution

The fourth proportional to 697.72, 1,045.96 and 542.81 is: 813.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.72 : 1,045.96 = 542.81 : x
  2. Step 2: Convert to fraction form
    697.72/1,045.96 = 542.81/x
  3. Step 3: Cross multiply
    697.72x = 1,045.96 × 542.81
  4. Step 4: Simplify right side
    697.72x = 567,750.96
  5. Step 5: Solve for x
    x = 567,750.96/697.72
  6. Step 6: Final answer
    x = 813.73

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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.