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Finding the Fourth Proportional to 549.18, 758.20 and 392.12

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Solution

The fourth proportional to 549.18, 758.20 and 392.12 is: 541.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.18 : 758.20 = 392.12 : x
  2. Step 2: Convert to fraction form
    549.18/758.20 = 392.12/x
  3. Step 3: Cross multiply
    549.18x = 758.20 × 392.12
  4. Step 4: Simplify right side
    549.18x = 297,305.38
  5. Step 5: Solve for x
    x = 297,305.38/549.18
  6. Step 6: Final answer
    x = 541.36

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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.