Home / 1,586.20-2,379.25-661.18

Finding the Fourth Proportional to 1,586.20, 2,379.25 and 661.18

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Solution

The fourth proportional to 1,586.20, 2,379.25 and 661.18 is: 991.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.20 : 2,379.25 = 661.18 : x
  2. Step 2: Convert to fraction form
    1,586.20/2,379.25 = 661.18/x
  3. Step 3: Cross multiply
    1,586.20x = 2,379.25 × 661.18
  4. Step 4: Simplify right side
    1,586.20x = 1,573,112.52
  5. Step 5: Solve for x
    x = 1,573,112.52/1,586.20
  6. Step 6: Final answer
    x = 991.75

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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.