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Finding the Fourth Proportional to 3,334.78, 5,000.28 and 1,385.92

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Solution

The fourth proportional to 3,334.78, 5,000.28 and 1,385.92 is: 2,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,334.78 : 5,000.28 = 1,385.92 : x
  2. Step 2: Convert to fraction form
    3,334.78/5,000.28 = 1,385.92/x
  3. Step 3: Cross multiply
    3,334.78x = 5,000.28 × 1,385.92
  4. Step 4: Simplify right side
    3,334.78x = 6,929,988.06
  5. Step 5: Solve for x
    x = 6,929,988.06/3,334.78
  6. Step 6: Final answer
    x = 2,078.09

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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.