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Finding the Fourth Proportional to 2,916.22, 4,375.14 and 1,272.91

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Solution

The fourth proportional to 2,916.22, 4,375.14 and 1,272.91 is: 1,909.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,916.22 : 4,375.14 = 1,272.91 : x
  2. Step 2: Convert to fraction form
    2,916.22/4,375.14 = 1,272.91/x
  3. Step 3: Cross multiply
    2,916.22x = 4,375.14 × 1,272.91
  4. Step 4: Simplify right side
    2,916.22x = 5,569,159.46
  5. Step 5: Solve for x
    x = 5,569,159.46/2,916.22
  6. Step 6: Final answer
    x = 1,909.72

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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.