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Finding the Fourth Proportional to 2,261.14, 3,390.78 and 873.70

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Solution

The fourth proportional to 2,261.14, 3,390.78 and 873.70 is: 1,310.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.14 : 3,390.78 = 873.70 : x
  2. Step 2: Convert to fraction form
    2,261.14/3,390.78 = 873.70/x
  3. Step 3: Cross multiply
    2,261.14x = 3,390.78 × 873.70
  4. Step 4: Simplify right side
    2,261.14x = 2,962,524.49
  5. Step 5: Solve for x
    x = 2,962,524.49/2,261.14
  6. Step 6: Final answer
    x = 1,310.19

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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.