Home / 1,587.79-2,382.09-1,311.18

Finding the Fourth Proportional to 1,587.79, 2,382.09 and 1,311.18

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Solution

The fourth proportional to 1,587.79, 2,382.09 and 1,311.18 is: 1,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.79 : 2,382.09 = 1,311.18 : x
  2. Step 2: Convert to fraction form
    1,587.79/2,382.09 = 1,311.18/x
  3. Step 3: Cross multiply
    1,587.79x = 2,382.09 × 1,311.18
  4. Step 4: Simplify right side
    1,587.79x = 3,123,348.77
  5. Step 5: Solve for x
    x = 3,123,348.77/1,587.79
  6. Step 6: Final answer
    x = 1,967.10

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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.