Home / 3,112.24-4,668.92-921.12

Finding the Fourth Proportional to 3,112.24, 4,668.92 and 921.12

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Solution

The fourth proportional to 3,112.24, 4,668.92 and 921.12 is: 1,381.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.24 : 4,668.92 = 921.12 : x
  2. Step 2: Convert to fraction form
    3,112.24/4,668.92 = 921.12/x
  3. Step 3: Cross multiply
    3,112.24x = 4,668.92 × 921.12
  4. Step 4: Simplify right side
    3,112.24x = 4,300,635.59
  5. Step 5: Solve for x
    x = 4,300,635.59/3,112.24
  6. Step 6: Final answer
    x = 1,381.85

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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.