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Finding the Fourth Proportional to 1,494.12, 2,061.90 and 873

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Solution

The fourth proportional to 1,494.12, 2,061.90 and 873 is: 1,204.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.12 : 2,061.90 = 873 : x
  2. Step 2: Convert to fraction form
    1,494.12/2,061.90 = 873/x
  3. Step 3: Cross multiply
    1,494.12x = 2,061.90 × 873
  4. Step 4: Simplify right side
    1,494.12x = 1,800,038.70
  5. Step 5: Solve for x
    x = 1,800,038.70/1,494.12
  6. Step 6: Final answer
    x = 1,204.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.