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Finding the Fourth Proportional to 721.08, 996.30 and 547.32

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Solution

The fourth proportional to 721.08, 996.30 and 547.32 is: 756.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.08 : 996.30 = 547.32 : x
  2. Step 2: Convert to fraction form
    721.08/996.30 = 547.32/x
  3. Step 3: Cross multiply
    721.08x = 996.30 × 547.32
  4. Step 4: Simplify right side
    721.08x = 545,294.92
  5. Step 5: Solve for x
    x = 545,294.92/721.08
  6. Step 6: Final answer
    x = 756.22

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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.