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Finding the Fourth Proportional to 2,874, 4,312.80 and 1,142.76

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Solution

The fourth proportional to 2,874, 4,312.80 and 1,142.76 is: 1,714.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,874 : 4,312.80 = 1,142.76 : x
  2. Step 2: Convert to fraction form
    2,874/4,312.80 = 1,142.76/x
  3. Step 3: Cross multiply
    2,874x = 4,312.80 × 1,142.76
  4. Step 4: Simplify right side
    2,874x = 4,928,495.33
  5. Step 5: Solve for x
    x = 4,928,495.33/2,874
  6. Step 6: Final answer
    x = 1,714.86

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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.