Home / 3,113.14-4,668.39-921.28

Finding the Fourth Proportional to 3,113.14, 4,668.39 and 921.28

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Solution

The fourth proportional to 3,113.14, 4,668.39 and 921.28 is: 1,381.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.14 : 4,668.39 = 921.28 : x
  2. Step 2: Convert to fraction form
    3,113.14/4,668.39 = 921.28/x
  3. Step 3: Cross multiply
    3,113.14x = 4,668.39 × 921.28
  4. Step 4: Simplify right side
    3,113.14x = 4,300,894.34
  5. Step 5: Solve for x
    x = 4,300,894.34/3,113.14
  6. Step 6: Final answer
    x = 1,381.53

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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.