Home / 1,147.12-1,581.60-1,085.56

Finding the Fourth Proportional to 1,147.12, 1,581.60 and 1,085.56

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Solution

The fourth proportional to 1,147.12, 1,581.60 and 1,085.56 is: 1,496.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.12 : 1,581.60 = 1,085.56 : x
  2. Step 2: Convert to fraction form
    1,147.12/1,581.60 = 1,085.56/x
  3. Step 3: Cross multiply
    1,147.12x = 1,581.60 × 1,085.56
  4. Step 4: Simplify right side
    1,147.12x = 1,716,921.70
  5. Step 5: Solve for x
    x = 1,716,921.70/1,147.12
  6. Step 6: Final answer
    x = 1,496.72

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1.5x scale

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.