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Finding the Fourth Proportional to 723.70, 997.68 and 487.23

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Solution

The fourth proportional to 723.70, 997.68 and 487.23 is: 671.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.70 : 997.68 = 487.23 : x
  2. Step 2: Convert to fraction form
    723.70/997.68 = 487.23/x
  3. Step 3: Cross multiply
    723.70x = 997.68 × 487.23
  4. Step 4: Simplify right side
    723.70x = 486,099.63
  5. Step 5: Solve for x
    x = 486,099.63/723.70
  6. Step 6: Final answer
    x = 671.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.