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Finding the Fourth Proportional to 2,689.55, 4,034.34 and 741.86

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Solution

The fourth proportional to 2,689.55, 4,034.34 and 741.86 is: 1,112.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.55 : 4,034.34 = 741.86 : x
  2. Step 2: Convert to fraction form
    2,689.55/4,034.34 = 741.86/x
  3. Step 3: Cross multiply
    2,689.55x = 4,034.34 × 741.86
  4. Step 4: Simplify right side
    2,689.55x = 2,992,915.47
  5. Step 5: Solve for x
    x = 2,992,915.47/2,689.55
  6. Step 6: Final answer
    x = 1,112.79

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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.