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Finding the Fourth Proportional to 541.69, 812.70 and 217.15

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Solution

The fourth proportional to 541.69, 812.70 and 217.15 is: 325.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.69 : 812.70 = 217.15 : x
  2. Step 2: Convert to fraction form
    541.69/812.70 = 217.15/x
  3. Step 3: Cross multiply
    541.69x = 812.70 × 217.15
  4. Step 4: Simplify right side
    541.69x = 176,475.77
  5. Step 5: Solve for x
    x = 176,475.77/541.69
  6. Step 6: Final answer
    x = 325.79

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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.