Home / 1,015.12-1,514.91-905.76

Finding the Fourth Proportional to 1,015.12, 1,514.91 and 905.76

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Solution

The fourth proportional to 1,015.12, 1,514.91 and 905.76 is: 1,351.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.12 : 1,514.91 = 905.76 : x
  2. Step 2: Convert to fraction form
    1,015.12/1,514.91 = 905.76/x
  3. Step 3: Cross multiply
    1,015.12x = 1,514.91 × 905.76
  4. Step 4: Simplify right side
    1,015.12x = 1,372,144.88
  5. Step 5: Solve for x
    x = 1,372,144.88/1,015.12
  6. Step 6: Final answer
    x = 1,351.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.