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Finding the Fourth Proportional to 541.61, 813.01 and 217.20

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Solution

The fourth proportional to 541.61, 813.01 and 217.20 is: 326.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.61 : 813.01 = 217.20 : x
  2. Step 2: Convert to fraction form
    541.61/813.01 = 217.20/x
  3. Step 3: Cross multiply
    541.61x = 813.01 × 217.20
  4. Step 4: Simplify right side
    541.61x = 176,585.77
  5. Step 5: Solve for x
    x = 176,585.77/541.61
  6. Step 6: Final answer
    x = 326.04

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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.