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Finding the Fourth Proportional to 542.45, 812.91 and 217.46

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Solution

The fourth proportional to 542.45, 812.91 and 217.46 is: 325.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.45 : 812.91 = 217.46 : x
  2. Step 2: Convert to fraction form
    542.45/812.91 = 217.46/x
  3. Step 3: Cross multiply
    542.45x = 812.91 × 217.46
  4. Step 4: Simplify right side
    542.45x = 176,775.41
  5. Step 5: Solve for x
    x = 176,775.41/542.45
  6. Step 6: Final answer
    x = 325.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.