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Finding the Fourth Proportional to 2,278.97, 3,420.06 and 818.17

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Solution

The fourth proportional to 2,278.97, 3,420.06 and 818.17 is: 1,227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.97 : 3,420.06 = 818.17 : x
  2. Step 2: Convert to fraction form
    2,278.97/3,420.06 = 818.17/x
  3. Step 3: Cross multiply
    2,278.97x = 3,420.06 × 818.17
  4. Step 4: Simplify right side
    2,278.97x = 2,798,178.87
  5. Step 5: Solve for x
    x = 2,798,178.87/2,278.97
  6. Step 6: Final answer
    x = 1,227.83

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1.5x scale

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.