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Finding the Fourth Proportional to 2,915.70, 4,372.94 and 1,067.70

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Solution

The fourth proportional to 2,915.70, 4,372.94 and 1,067.70 is: 1,601.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.70 : 4,372.94 = 1,067.70 : x
  2. Step 2: Convert to fraction form
    2,915.70/4,372.94 = 1,067.70/x
  3. Step 3: Cross multiply
    2,915.70x = 4,372.94 × 1,067.70
  4. Step 4: Simplify right side
    2,915.70x = 4,668,988.04
  5. Step 5: Solve for x
    x = 4,668,988.04/2,915.70
  6. Step 6: Final answer
    x = 1,601.33

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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.