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Finding the Fourth Proportional to 549.15, 757.55 and 372.12

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Solution

The fourth proportional to 549.15, 757.55 and 372.12 is: 513.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.15 : 757.55 = 372.12 : x
  2. Step 2: Convert to fraction form
    549.15/757.55 = 372.12/x
  3. Step 3: Cross multiply
    549.15x = 757.55 × 372.12
  4. Step 4: Simplify right side
    549.15x = 281,897.65
  5. Step 5: Solve for x
    x = 281,897.65/549.15
  6. Step 6: Final answer
    x = 513.33

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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.