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Finding the Fourth Proportional to 541.61, 812.63 and 217.21

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Solution

The fourth proportional to 541.61, 812.63 and 217.21 is: 325.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.61 : 812.63 = 217.21 : x
  2. Step 2: Convert to fraction form
    541.61/812.63 = 217.21/x
  3. Step 3: Cross multiply
    541.61x = 812.63 × 217.21
  4. Step 4: Simplify right side
    541.61x = 176,506.21
  5. Step 5: Solve for x
    x = 176,506.21/541.61
  6. Step 6: Final answer
    x = 325.89

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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.