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Finding the Fourth Proportional to 741.14, 1,112.96 and 711.72

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Solution

The fourth proportional to 741.14, 1,112.96 and 711.72 is: 1,068.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.14 : 1,112.96 = 711.72 : x
  2. Step 2: Convert to fraction form
    741.14/1,112.96 = 711.72/x
  3. Step 3: Cross multiply
    741.14x = 1,112.96 × 711.72
  4. Step 4: Simplify right side
    741.14x = 792,115.89
  5. Step 5: Solve for x
    x = 792,115.89/741.14
  6. Step 6: Final answer
    x = 1,068.78

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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.