Home / 2,861.70-3,948.01-1,866.61

Finding the Fourth Proportional to 2,861.70, 3,948.01 and 1,866.61

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Solution

The fourth proportional to 2,861.70, 3,948.01 and 1,866.61 is: 2,575.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.70 : 3,948.01 = 1,866.61 : x
  2. Step 2: Convert to fraction form
    2,861.70/3,948.01 = 1,866.61/x
  3. Step 3: Cross multiply
    2,861.70x = 3,948.01 × 1,866.61
  4. Step 4: Simplify right side
    2,861.70x = 7,369,394.95
  5. Step 5: Solve for x
    x = 7,369,394.95/2,861.70
  6. Step 6: Final answer
    x = 2,575.18

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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.