Home / 1,695.88-2,542.30-721.45

Finding the Fourth Proportional to 1,695.88, 2,542.30 and 721.45

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Solution

The fourth proportional to 1,695.88, 2,542.30 and 721.45 is: 1,081.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.88 : 2,542.30 = 721.45 : x
  2. Step 2: Convert to fraction form
    1,695.88/2,542.30 = 721.45/x
  3. Step 3: Cross multiply
    1,695.88x = 2,542.30 × 721.45
  4. Step 4: Simplify right side
    1,695.88x = 1,834,142.34
  5. Step 5: Solve for x
    x = 1,834,142.34/1,695.88
  6. Step 6: Final answer
    x = 1,081.53

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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.