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Finding the Fourth Proportional to 2,762.34, 4,142.88 and 787.92

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Solution

The fourth proportional to 2,762.34, 4,142.88 and 787.92 is: 1,181.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,762.34 : 4,142.88 = 787.92 : x
  2. Step 2: Convert to fraction form
    2,762.34/4,142.88 = 787.92/x
  3. Step 3: Cross multiply
    2,762.34x = 4,142.88 × 787.92
  4. Step 4: Simplify right side
    2,762.34x = 3,264,273.55
  5. Step 5: Solve for x
    x = 3,264,273.55/2,762.34
  6. Step 6: Final answer
    x = 1,181.71

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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.