Home / 1,727.28-2,589.45-688.02

Finding the Fourth Proportional to 1,727.28, 2,589.45 and 688.02

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Solution

The fourth proportional to 1,727.28, 2,589.45 and 688.02 is: 1,031.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.28 : 2,589.45 = 688.02 : x
  2. Step 2: Convert to fraction form
    1,727.28/2,589.45 = 688.02/x
  3. Step 3: Cross multiply
    1,727.28x = 2,589.45 × 688.02
  4. Step 4: Simplify right side
    1,727.28x = 1,781,593.39
  5. Step 5: Solve for x
    x = 1,781,593.39/1,727.28
  6. Step 6: Final answer
    x = 1,031.44

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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.