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Finding the Fourth Proportional to 3,519.45, 5,278.91 and 922.32

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Solution

The fourth proportional to 3,519.45, 5,278.91 and 922.32 is: 1,383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519.45 : 5,278.91 = 922.32 : x
  2. Step 2: Convert to fraction form
    3,519.45/5,278.91 = 922.32/x
  3. Step 3: Cross multiply
    3,519.45x = 5,278.91 × 922.32
  4. Step 4: Simplify right side
    3,519.45x = 4,868,839.66
  5. Step 5: Solve for x
    x = 4,868,839.66/3,519.45
  6. Step 6: Final answer
    x = 1,383.41

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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.