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Finding the Fourth Proportional to 1,676.46, 2,514.68 and 987.92

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Solution

The fourth proportional to 1,676.46, 2,514.68 and 987.92 is: 1,481.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.46 : 2,514.68 = 987.92 : x
  2. Step 2: Convert to fraction form
    1,676.46/2,514.68 = 987.92/x
  3. Step 3: Cross multiply
    1,676.46x = 2,514.68 × 987.92
  4. Step 4: Simplify right side
    1,676.46x = 2,484,285.15
  5. Step 5: Solve for x
    x = 2,484,285.15/1,676.46
  6. Step 6: Final answer
    x = 1,481.86

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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.