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Finding the Fourth Proportional to 2,188.81, 3,283.65 and 708.43

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Solution

The fourth proportional to 2,188.81, 3,283.65 and 708.43 is: 1,062.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.81 : 3,283.65 = 708.43 : x
  2. Step 2: Convert to fraction form
    2,188.81/3,283.65 = 708.43/x
  3. Step 3: Cross multiply
    2,188.81x = 3,283.65 × 708.43
  4. Step 4: Simplify right side
    2,188.81x = 2,326,236.17
  5. Step 5: Solve for x
    x = 2,326,236.17/2,188.81
  6. Step 6: Final answer
    x = 1,062.79

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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.