Home / 3,112.53-4,668.78-921.27

Finding the Fourth Proportional to 3,112.53, 4,668.78 and 921.27

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Solution

The fourth proportional to 3,112.53, 4,668.78 and 921.27 is: 1,381.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.53 : 4,668.78 = 921.27 : x
  2. Step 2: Convert to fraction form
    3,112.53/4,668.78 = 921.27/x
  3. Step 3: Cross multiply
    3,112.53x = 4,668.78 × 921.27
  4. Step 4: Simplify right side
    3,112.53x = 4,301,206.95
  5. Step 5: Solve for x
    x = 4,301,206.95/3,112.53
  6. Step 6: Final answer
    x = 1,381.90

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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.