Home / 1,727.52-2,589.60-688.20

Finding the Fourth Proportional to 1,727.52, 2,589.60 and 688.20

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Solution

The fourth proportional to 1,727.52, 2,589.60 and 688.20 is: 1,031.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.52 : 2,589.60 = 688.20 : x
  2. Step 2: Convert to fraction form
    1,727.52/2,589.60 = 688.20/x
  3. Step 3: Cross multiply
    1,727.52x = 2,589.60 × 688.20
  4. Step 4: Simplify right side
    1,727.52x = 1,782,162.72
  5. Step 5: Solve for x
    x = 1,782,162.72/1,727.52
  6. Step 6: Final answer
    x = 1,031.63

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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.