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Finding the Fourth Proportional to 1,786.50, 2,677.89 and 747.10

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Solution

The fourth proportional to 1,786.50, 2,677.89 and 747.10 is: 1,119.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.50 : 2,677.89 = 747.10 : x
  2. Step 2: Convert to fraction form
    1,786.50/2,677.89 = 747.10/x
  3. Step 3: Cross multiply
    1,786.50x = 2,677.89 × 747.10
  4. Step 4: Simplify right side
    1,786.50x = 2,000,651.62
  5. Step 5: Solve for x
    x = 2,000,651.62/1,786.50
  6. Step 6: Final answer
    x = 1,119.87

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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.