Home / 2,085.05-3,125.19-987.86

Finding the Fourth Proportional to 2,085.05, 3,125.19 and 987.86

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Solution

The fourth proportional to 2,085.05, 3,125.19 and 987.86 is: 1,480.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.05 : 3,125.19 = 987.86 : x
  2. Step 2: Convert to fraction form
    2,085.05/3,125.19 = 987.86/x
  3. Step 3: Cross multiply
    2,085.05x = 3,125.19 × 987.86
  4. Step 4: Simplify right side
    2,085.05x = 3,087,250.19
  5. Step 5: Solve for x
    x = 3,087,250.19/2,085.05
  6. Step 6: Final answer
    x = 1,480.66

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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.