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Finding the Fourth Proportional to 2,185.74, 3,277.90 and 724.50

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Solution

The fourth proportional to 2,185.74, 3,277.90 and 724.50 is: 1,086.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.74 : 3,277.90 = 724.50 : x
  2. Step 2: Convert to fraction form
    2,185.74/3,277.90 = 724.50/x
  3. Step 3: Cross multiply
    2,185.74x = 3,277.90 × 724.50
  4. Step 4: Simplify right side
    2,185.74x = 2,374,838.55
  5. Step 5: Solve for x
    x = 2,374,838.55/2,185.74
  6. Step 6: Final answer
    x = 1,086.51

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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.