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Finding the Fourth Proportional to 3,239.88, 4,470.24 and 1,913.04

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Solution

The fourth proportional to 3,239.88, 4,470.24 and 1,913.04 is: 2,639.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.88 : 4,470.24 = 1,913.04 : x
  2. Step 2: Convert to fraction form
    3,239.88/4,470.24 = 1,913.04/x
  3. Step 3: Cross multiply
    3,239.88x = 4,470.24 × 1,913.04
  4. Step 4: Simplify right side
    3,239.88x = 8,551,747.93
  5. Step 5: Solve for x
    x = 8,551,747.93/3,239.88
  6. Step 6: Final answer
    x = 2,639.53

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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.