Home / 1,861.40-2,792.27-691.35

Finding the Fourth Proportional to 1,861.40, 2,792.27 and 691.35

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Solution

The fourth proportional to 1,861.40, 2,792.27 and 691.35 is: 1,037.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.40 : 2,792.27 = 691.35 : x
  2. Step 2: Convert to fraction form
    1,861.40/2,792.27 = 691.35/x
  3. Step 3: Cross multiply
    1,861.40x = 2,792.27 × 691.35
  4. Step 4: Simplify right side
    1,861.40x = 1,930,432.41
  5. Step 5: Solve for x
    x = 1,930,432.41/1,861.40
  6. Step 6: Final answer
    x = 1,037.09

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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.