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Finding the Fourth Proportional to 723.74, 997.72 and 487.82

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Solution

The fourth proportional to 723.74, 997.72 and 487.82 is: 672.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.74 : 997.72 = 487.82 : x
  2. Step 2: Convert to fraction form
    723.74/997.72 = 487.82/x
  3. Step 3: Cross multiply
    723.74x = 997.72 × 487.82
  4. Step 4: Simplify right side
    723.74x = 486,709.05
  5. Step 5: Solve for x
    x = 486,709.05/723.74
  6. Step 6: Final answer
    x = 672.50

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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.