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Finding the Fourth Proportional to 741.60, 1,112.61 and 254.69

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Solution

The fourth proportional to 741.60, 1,112.61 and 254.69 is: 382.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.60 : 1,112.61 = 254.69 : x
  2. Step 2: Convert to fraction form
    741.60/1,112.61 = 254.69/x
  3. Step 3: Cross multiply
    741.60x = 1,112.61 × 254.69
  4. Step 4: Simplify right side
    741.60x = 283,372.79
  5. Step 5: Solve for x
    x = 283,372.79/741.60
  6. Step 6: Final answer
    x = 382.11

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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.