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Finding the Fourth Proportional to 721.12, 993.84 and 524.32

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Solution

The fourth proportional to 721.12, 993.84 and 524.32 is: 722.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.12 : 993.84 = 524.32 : x
  2. Step 2: Convert to fraction form
    721.12/993.84 = 524.32/x
  3. Step 3: Cross multiply
    721.12x = 993.84 × 524.32
  4. Step 4: Simplify right side
    721.12x = 521,090.19
  5. Step 5: Solve for x
    x = 521,090.19/721.12
  6. Step 6: Final answer
    x = 722.61

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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.