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Finding the Fourth Proportional to 2,959.88, 4,431.92 and 1,916.87

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Solution

The fourth proportional to 2,959.88, 4,431.92 and 1,916.87 is: 2,870.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,959.88 : 4,431.92 = 1,916.87 : x
  2. Step 2: Convert to fraction form
    2,959.88/4,431.92 = 1,916.87/x
  3. Step 3: Cross multiply
    2,959.88x = 4,431.92 × 1,916.87
  4. Step 4: Simplify right side
    2,959.88x = 8,495,382.75
  5. Step 5: Solve for x
    x = 8,495,382.75/2,959.88
  6. Step 6: Final answer
    x = 2,870.18

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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.