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Finding the Fourth Proportional to 1,695.31, 2,544.04 and 721.41

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Solution

The fourth proportional to 1,695.31, 2,544.04 and 721.41 is: 1,082.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.31 : 2,544.04 = 721.41 : x
  2. Step 2: Convert to fraction form
    1,695.31/2,544.04 = 721.41/x
  3. Step 3: Cross multiply
    1,695.31x = 2,544.04 × 721.41
  4. Step 4: Simplify right side
    1,695.31x = 1,835,295.90
  5. Step 5: Solve for x
    x = 1,835,295.90/1,695.31
  6. Step 6: Final answer
    x = 1,082.57

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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.