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Finding the Fourth Proportional to 542.66, 749.19 and 356.48

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Solution

The fourth proportional to 542.66, 749.19 and 356.48 is: 492.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.66 : 749.19 = 356.48 : x
  2. Step 2: Convert to fraction form
    542.66/749.19 = 356.48/x
  3. Step 3: Cross multiply
    542.66x = 749.19 × 356.48
  4. Step 4: Simplify right side
    542.66x = 267,071.65
  5. Step 5: Solve for x
    x = 267,071.65/542.66
  6. Step 6: Final answer
    x = 492.15

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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.