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Finding the Fourth Proportional to 2,335.78, 3,227.98 and 1,915.46

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Solution

The fourth proportional to 2,335.78, 3,227.98 and 1,915.46 is: 2,647.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,335.78 : 3,227.98 = 1,915.46 : x
  2. Step 2: Convert to fraction form
    2,335.78/3,227.98 = 1,915.46/x
  3. Step 3: Cross multiply
    2,335.78x = 3,227.98 × 1,915.46
  4. Step 4: Simplify right side
    2,335.78x = 6,183,066.57
  5. Step 5: Solve for x
    x = 6,183,066.57/2,335.78
  6. Step 6: Final answer
    x = 2,647.11

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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.