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Finding the Fourth Proportional to 1,486.70, 2,230.05 and 1,251.80

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Solution

The fourth proportional to 1,486.70, 2,230.05 and 1,251.80 is: 1,877.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.70 : 2,230.05 = 1,251.80 : x
  2. Step 2: Convert to fraction form
    1,486.70/2,230.05 = 1,251.80/x
  3. Step 3: Cross multiply
    1,486.70x = 2,230.05 × 1,251.80
  4. Step 4: Simplify right side
    1,486.70x = 2,791,576.59
  5. Step 5: Solve for x
    x = 2,791,576.59/1,486.70
  6. Step 6: Final answer
    x = 1,877.70

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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.