Home / 1,420.38-2,132.20-1,339.38

Finding the Fourth Proportional to 1,420.38, 2,132.20 and 1,339.38

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Solution

The fourth proportional to 1,420.38, 2,132.20 and 1,339.38 is: 2,010.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.38 : 2,132.20 = 1,339.38 : x
  2. Step 2: Convert to fraction form
    1,420.38/2,132.20 = 1,339.38/x
  3. Step 3: Cross multiply
    1,420.38x = 2,132.20 × 1,339.38
  4. Step 4: Simplify right side
    1,420.38x = 2,855,826.04
  5. Step 5: Solve for x
    x = 2,855,826.04/1,420.38
  6. Step 6: Final answer
    x = 2,010.61

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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.