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Finding the Fourth Proportional to 2,451.85, 3,677.78 and 891.90

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Solution

The fourth proportional to 2,451.85, 3,677.78 and 891.90 is: 1,337.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,451.85 : 3,677.78 = 891.90 : x
  2. Step 2: Convert to fraction form
    2,451.85/3,677.78 = 891.90/x
  3. Step 3: Cross multiply
    2,451.85x = 3,677.78 × 891.90
  4. Step 4: Simplify right side
    2,451.85x = 3,280,214.21
  5. Step 5: Solve for x
    x = 3,280,214.21/2,451.85
  6. Step 6: Final answer
    x = 1,337.85

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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.