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Finding the Fourth Proportional to 2,186.50, 3,280.23 and 818.50

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Solution

The fourth proportional to 2,186.50, 3,280.23 and 818.50 is: 1,227.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.50 : 3,280.23 = 818.50 : x
  2. Step 2: Convert to fraction form
    2,186.50/3,280.23 = 818.50/x
  3. Step 3: Cross multiply
    2,186.50x = 3,280.23 × 818.50
  4. Step 4: Simplify right side
    2,186.50x = 2,684,868.26
  5. Step 5: Solve for x
    x = 2,684,868.26/2,186.50
  6. Step 6: Final answer
    x = 1,227.93

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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.