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Finding the Fourth Proportional to 2,581.76, 3,873.18 and 1,042.76

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Solution

The fourth proportional to 2,581.76, 3,873.18 and 1,042.76 is: 1,564.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.76 : 3,873.18 = 1,042.76 : x
  2. Step 2: Convert to fraction form
    2,581.76/3,873.18 = 1,042.76/x
  3. Step 3: Cross multiply
    2,581.76x = 3,873.18 × 1,042.76
  4. Step 4: Simplify right side
    2,581.76x = 4,038,797.18
  5. Step 5: Solve for x
    x = 4,038,797.18/2,581.76
  6. Step 6: Final answer
    x = 1,564.36

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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.