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Finding the Fourth Proportional to 3,912.24, 5,398.32 and 2,340

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Solution

The fourth proportional to 3,912.24, 5,398.32 and 2,340 is: 3,228.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.24 : 5,398.32 = 2,340 : x
  2. Step 2: Convert to fraction form
    3,912.24/5,398.32 = 2,340/x
  3. Step 3: Cross multiply
    3,912.24x = 5,398.32 × 2,340
  4. Step 4: Simplify right side
    3,912.24x = 12,632,068.80
  5. Step 5: Solve for x
    x = 12,632,068.80/3,912.24
  6. Step 6: Final answer
    x = 3,228.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.