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Finding the Fourth Proportional to 2,487.60, 3,733.38 and 1,391.76

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Solution

The fourth proportional to 2,487.60, 3,733.38 and 1,391.76 is: 2,088.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.60 : 3,733.38 = 1,391.76 : x
  2. Step 2: Convert to fraction form
    2,487.60/3,733.38 = 1,391.76/x
  3. Step 3: Cross multiply
    2,487.60x = 3,733.38 × 1,391.76
  4. Step 4: Simplify right side
    2,487.60x = 5,195,968.95
  5. Step 5: Solve for x
    x = 5,195,968.95/2,487.60
  6. Step 6: Final answer
    x = 2,088.75

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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.