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Finding the Fourth Proportional to 2,913.87, 4,375.67 and 2,787.51

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Solution

The fourth proportional to 2,913.87, 4,375.67 and 2,787.51 is: 4,185.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.87 : 4,375.67 = 2,787.51 : x
  2. Step 2: Convert to fraction form
    2,913.87/4,375.67 = 2,787.51/x
  3. Step 3: Cross multiply
    2,913.87x = 4,375.67 × 2,787.51
  4. Step 4: Simplify right side
    2,913.87x = 12,197,242.03
  5. Step 5: Solve for x
    x = 12,197,242.03/2,913.87
  6. Step 6: Final answer
    x = 4,185.92

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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.