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Finding the Fourth Proportional to 334.66, 501.92 and 91.20

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Solution

The fourth proportional to 334.66, 501.92 and 91.20 is: 136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.66 : 501.92 = 91.20 : x
  2. Step 2: Convert to fraction form
    334.66/501.92 = 91.20/x
  3. Step 3: Cross multiply
    334.66x = 501.92 × 91.20
  4. Step 4: Simplify right side
    334.66x = 45,775.10
  5. Step 5: Solve for x
    x = 45,775.10/334.66
  6. Step 6: Final answer
    x = 136.78

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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.