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Finding the Fourth Proportional to 334.53, 501.78 and 91.05

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Solution

The fourth proportional to 334.53, 501.78 and 91.05 is: 136.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.53 : 501.78 = 91.05 : x
  2. Step 2: Convert to fraction form
    334.53/501.78 = 91.05/x
  3. Step 3: Cross multiply
    334.53x = 501.78 × 91.05
  4. Step 4: Simplify right side
    334.53x = 45,684.10
  5. Step 5: Solve for x
    x = 45,684.10/334.53
  6. Step 6: Final answer
    x = 136.56

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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.