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Finding the Fourth Proportional to 2,689.68, 4,034.64 and 741.84

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Solution

The fourth proportional to 2,689.68, 4,034.64 and 741.84 is: 1,112.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.68 : 4,034.64 = 741.84 : x
  2. Step 2: Convert to fraction form
    2,689.68/4,034.64 = 741.84/x
  3. Step 3: Cross multiply
    2,689.68x = 4,034.64 × 741.84
  4. Step 4: Simplify right side
    2,689.68x = 2,993,057.34
  5. Step 5: Solve for x
    x = 2,993,057.34/2,689.68
  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.