Home / 1,727.40-2,592.29-687.45

Finding the Fourth Proportional to 1,727.40, 2,592.29 and 687.45

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Solution

The fourth proportional to 1,727.40, 2,592.29 and 687.45 is: 1,031.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.40 : 2,592.29 = 687.45 : x
  2. Step 2: Convert to fraction form
    1,727.40/2,592.29 = 687.45/x
  3. Step 3: Cross multiply
    1,727.40x = 2,592.29 × 687.45
  4. Step 4: Simplify right side
    1,727.40x = 1,782,069.76
  5. Step 5: Solve for x
    x = 1,782,069.76/1,727.40
  6. Step 6: Final answer
    x = 1,031.65

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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.