Home / 1,861.91-2,569.24-1,115.85

Finding the Fourth Proportional to 1,861.91, 2,569.24 and 1,115.85

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Solution

The fourth proportional to 1,861.91, 2,569.24 and 1,115.85 is: 1,539.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.91 : 2,569.24 = 1,115.85 : x
  2. Step 2: Convert to fraction form
    1,861.91/2,569.24 = 1,115.85/x
  3. Step 3: Cross multiply
    1,861.91x = 2,569.24 × 1,115.85
  4. Step 4: Simplify right side
    1,861.91x = 2,866,870.82
  5. Step 5: Solve for x
    x = 2,866,870.82/1,861.91
  6. Step 6: Final answer
    x = 1,539.75

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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.