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Finding the Fourth Proportional to 2,872.75, 4,310.24 and 1,118.99

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Solution

The fourth proportional to 2,872.75, 4,310.24 and 1,118.99 is: 1,678.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.75 : 4,310.24 = 1,118.99 : x
  2. Step 2: Convert to fraction form
    2,872.75/4,310.24 = 1,118.99/x
  3. Step 3: Cross multiply
    2,872.75x = 4,310.24 × 1,118.99
  4. Step 4: Simplify right side
    2,872.75x = 4,823,115.46
  5. Step 5: Solve for x
    x = 4,823,115.46/2,872.75
  6. Step 6: Final answer
    x = 1,678.92

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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.