Home / 1,721.28-2,581.92-625.65

Finding the Fourth Proportional to 1,721.28, 2,581.92 and 625.65

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Solution

The fourth proportional to 1,721.28, 2,581.92 and 625.65 is: 938.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.28 : 2,581.92 = 625.65 : x
  2. Step 2: Convert to fraction form
    1,721.28/2,581.92 = 625.65/x
  3. Step 3: Cross multiply
    1,721.28x = 2,581.92 × 625.65
  4. Step 4: Simplify right side
    1,721.28x = 1,615,378.25
  5. Step 5: Solve for x
    x = 1,615,378.25/1,721.28
  6. Step 6: Final answer
    x = 938.48

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Similar ratio
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1.5x scale

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.