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Finding the Fourth Proportional to 697.86, 1,045.17 and 673.56

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Solution

The fourth proportional to 697.86, 1,045.17 and 673.56 is: 1,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.86 : 1,045.17 = 673.56 : x
  2. Step 2: Convert to fraction form
    697.86/1,045.17 = 673.56/x
  3. Step 3: Cross multiply
    697.86x = 1,045.17 × 673.56
  4. Step 4: Simplify right side
    697.86x = 703,984.71
  5. Step 5: Solve for x
    x = 703,984.71/697.86
  6. Step 6: Final answer
    x = 1,008.78

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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.