Home / 2,085.30-3,125.57-988.11

Finding the Fourth Proportional to 2,085.30, 3,125.57 and 988.11

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Solution

The fourth proportional to 2,085.30, 3,125.57 and 988.11 is: 1,481.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.30 : 3,125.57 = 988.11 : x
  2. Step 2: Convert to fraction form
    2,085.30/3,125.57 = 988.11/x
  3. Step 3: Cross multiply
    2,085.30x = 3,125.57 × 988.11
  4. Step 4: Simplify right side
    2,085.30x = 3,088,402.03
  5. Step 5: Solve for x
    x = 3,088,402.03/2,085.30
  6. Step 6: Final answer
    x = 1,481.03

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1.5x scale

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.