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Finding the Fourth Proportional to 487.36, 725.61 and 484.92

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Solution

The fourth proportional to 487.36, 725.61 and 484.92 is: 721.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.36 : 725.61 = 484.92 : x
  2. Step 2: Convert to fraction form
    487.36/725.61 = 484.92/x
  3. Step 3: Cross multiply
    487.36x = 725.61 × 484.92
  4. Step 4: Simplify right side
    487.36x = 351,862.80
  5. Step 5: Solve for x
    x = 351,862.80/487.36
  6. Step 6: Final answer
    x = 721.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.