Home / 1,721.28-2,369.76-1,369.92

Finding the Fourth Proportional to 1,721.28, 2,369.76 and 1,369.92

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Solution

The fourth proportional to 1,721.28, 2,369.76 and 1,369.92 is: 1,886.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.28 : 2,369.76 = 1,369.92 : x
  2. Step 2: Convert to fraction form
    1,721.28/2,369.76 = 1,369.92/x
  3. Step 3: Cross multiply
    1,721.28x = 2,369.76 × 1,369.92
  4. Step 4: Simplify right side
    1,721.28x = 3,246,381.62
  5. Step 5: Solve for x
    x = 3,246,381.62/1,721.28
  6. Step 6: Final answer
    x = 1,886.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.