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Finding the Fourth Proportional to 274.02, 410.79 and 91.30

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Solution

The fourth proportional to 274.02, 410.79 and 91.30 is: 136.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.02 : 410.79 = 91.30 : x
  2. Step 2: Convert to fraction form
    274.02/410.79 = 91.30/x
  3. Step 3: Cross multiply
    274.02x = 410.79 × 91.30
  4. Step 4: Simplify right side
    274.02x = 37,505.13
  5. Step 5: Solve for x
    x = 37,505.13/274.02
  6. Step 6: Final answer
    x = 136.87

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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.