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Finding the Fourth Proportional to 3,230, 4,845.76 and 921.44

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Solution

The fourth proportional to 3,230, 4,845.76 and 921.44 is: 1,382.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,230 : 4,845.76 = 921.44 : x
  2. Step 2: Convert to fraction form
    3,230/4,845.76 = 921.44/x
  3. Step 3: Cross multiply
    3,230x = 4,845.76 × 921.44
  4. Step 4: Simplify right side
    3,230x = 4,465,077.09
  5. Step 5: Solve for x
    x = 4,465,077.09/3,230
  6. Step 6: Final answer
    x = 1,382.38

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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.