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Finding the Fourth Proportional to 3,711.20, 5,562 and 1,760.72

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Solution

The fourth proportional to 3,711.20, 5,562 and 1,760.72 is: 2,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.20 : 5,562 = 1,760.72 : x
  2. Step 2: Convert to fraction form
    3,711.20/5,562 = 1,760.72/x
  3. Step 3: Cross multiply
    3,711.20x = 5,562 × 1,760.72
  4. Step 4: Simplify right side
    3,711.20x = 9,793,124.64
  5. Step 5: Solve for x
    x = 9,793,124.64/3,711.20
  6. Step 6: Final answer
    x = 2,638.80

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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.