Home / 1,552.79-2,143.11-1,387.91

Finding the Fourth Proportional to 1,552.79, 2,143.11 and 1,387.91

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Solution

The fourth proportional to 1,552.79, 2,143.11 and 1,387.91 is: 1,915.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,552.79 : 2,143.11 = 1,387.91 : x
  2. Step 2: Convert to fraction form
    1,552.79/2,143.11 = 1,387.91/x
  3. Step 3: Cross multiply
    1,552.79x = 2,143.11 × 1,387.91
  4. Step 4: Simplify right side
    1,552.79x = 2,974,443.80
  5. Step 5: Solve for x
    x = 2,974,443.80/1,552.79
  6. Step 6: Final answer
    x = 1,915.55

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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.