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Finding the Fourth Proportional to 3,930.69, 5,425.12 and 2,253.22

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Solution

The fourth proportional to 3,930.69, 5,425.12 and 2,253.22 is: 3,109.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.69 : 5,425.12 = 2,253.22 : x
  2. Step 2: Convert to fraction form
    3,930.69/5,425.12 = 2,253.22/x
  3. Step 3: Cross multiply
    3,930.69x = 5,425.12 × 2,253.22
  4. Step 4: Simplify right side
    3,930.69x = 12,223,999.74
  5. Step 5: Solve for x
    x = 12,223,999.74/3,930.69
  6. Step 6: Final answer
    x = 3,109.89

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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.