Home / 2,085.08-3,129.19-1,425.38

Finding the Fourth Proportional to 2,085.08, 3,129.19 and 1,425.38

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Solution

The fourth proportional to 2,085.08, 3,129.19 and 1,425.38 is: 2,139.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.08 : 3,129.19 = 1,425.38 : x
  2. Step 2: Convert to fraction form
    2,085.08/3,129.19 = 1,425.38/x
  3. Step 3: Cross multiply
    2,085.08x = 3,129.19 × 1,425.38
  4. Step 4: Simplify right side
    2,085.08x = 4,460,265.63
  5. Step 5: Solve for x
    x = 4,460,265.63/2,085.08
  6. Step 6: Final answer
    x = 2,139.14

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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.