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Finding the Fourth Proportional to 2,278.89, 3,418.61 and 818.19

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Solution

The fourth proportional to 2,278.89, 3,418.61 and 818.19 is: 1,227.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.89 : 3,418.61 = 818.19 : x
  2. Step 2: Convert to fraction form
    2,278.89/3,418.61 = 818.19/x
  3. Step 3: Cross multiply
    2,278.89x = 3,418.61 × 818.19
  4. Step 4: Simplify right side
    2,278.89x = 2,797,068.42
  5. Step 5: Solve for x
    x = 2,797,068.42/2,278.89
  6. Step 6: Final answer
    x = 1,227.38

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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.