Home / 1,512.30-2,085.75-988.86

Finding the Fourth Proportional to 1,512.30, 2,085.75 and 988.86

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Solution

The fourth proportional to 1,512.30, 2,085.75 and 988.86 is: 1,363.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.30 : 2,085.75 = 988.86 : x
  2. Step 2: Convert to fraction form
    1,512.30/2,085.75 = 988.86/x
  3. Step 3: Cross multiply
    1,512.30x = 2,085.75 × 988.86
  4. Step 4: Simplify right side
    1,512.30x = 2,062,514.75
  5. Step 5: Solve for x
    x = 2,062,514.75/1,512.30
  6. Step 6: Final answer
    x = 1,363.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.