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Finding the Fourth Proportional to 2,188.75, 3,283.10 and 545.29

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Solution

The fourth proportional to 2,188.75, 3,283.10 and 545.29 is: 817.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.75 : 3,283.10 = 545.29 : x
  2. Step 2: Convert to fraction form
    2,188.75/3,283.10 = 545.29/x
  3. Step 3: Cross multiply
    2,188.75x = 3,283.10 × 545.29
  4. Step 4: Simplify right side
    2,188.75x = 1,790,241.60
  5. Step 5: Solve for x
    x = 1,790,241.60/2,188.75
  6. Step 6: Final answer
    x = 817.93

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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.