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Finding the Fourth Proportional to 1,677.92, 2,517.42 and 812.84

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Solution

The fourth proportional to 1,677.92, 2,517.42 and 812.84 is: 1,219.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.92 : 2,517.42 = 812.84 : x
  2. Step 2: Convert to fraction form
    1,677.92/2,517.42 = 812.84/x
  3. Step 3: Cross multiply
    1,677.92x = 2,517.42 × 812.84
  4. Step 4: Simplify right side
    1,677.92x = 2,046,259.67
  5. Step 5: Solve for x
    x = 2,046,259.67/1,677.92
  6. Step 6: Final answer
    x = 1,219.52

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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.