Home / 1,915.17-2,642.04-1,251.78

Finding the Fourth Proportional to 1,915.17, 2,642.04 and 1,251.78

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Solution

The fourth proportional to 1,915.17, 2,642.04 and 1,251.78 is: 1,726.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.17 : 2,642.04 = 1,251.78 : x
  2. Step 2: Convert to fraction form
    1,915.17/2,642.04 = 1,251.78/x
  3. Step 3: Cross multiply
    1,915.17x = 2,642.04 × 1,251.78
  4. Step 4: Simplify right side
    1,915.17x = 3,307,252.83
  5. Step 5: Solve for x
    x = 3,307,252.83/1,915.17
  6. Step 6: Final answer
    x = 1,726.87

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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.