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Finding the Fourth Proportional to 3,221.84, 4,832.40 and 913.52

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Solution

The fourth proportional to 3,221.84, 4,832.40 and 913.52 is: 1,370.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.84 : 4,832.40 = 913.52 : x
  2. Step 2: Convert to fraction form
    3,221.84/4,832.40 = 913.52/x
  3. Step 3: Cross multiply
    3,221.84x = 4,832.40 × 913.52
  4. Step 4: Simplify right side
    3,221.84x = 4,414,494.05
  5. Step 5: Solve for x
    x = 4,414,494.05/3,221.84
  6. Step 6: Final answer
    x = 1,370.18

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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.