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Finding the Fourth Proportional to 2,916.84, 4,375.92 and 969.12

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Solution

The fourth proportional to 2,916.84, 4,375.92 and 969.12 is: 1,453.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,916.84 : 4,375.92 = 969.12 : x
  2. Step 2: Convert to fraction form
    2,916.84/4,375.92 = 969.12/x
  3. Step 3: Cross multiply
    2,916.84x = 4,375.92 × 969.12
  4. Step 4: Simplify right side
    2,916.84x = 4,240,791.59
  5. Step 5: Solve for x
    x = 4,240,791.59/2,916.84
  6. Step 6: Final answer
    x = 1,453.90

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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.