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Finding the Fourth Proportional to 2,278.86, 3,418.52 and 818.58

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Solution

The fourth proportional to 2,278.86, 3,418.52 and 818.58 is: 1,227.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.86 : 3,418.52 = 818.58 : x
  2. Step 2: Convert to fraction form
    2,278.86/3,418.52 = 818.58/x
  3. Step 3: Cross multiply
    2,278.86x = 3,418.52 × 818.58
  4. Step 4: Simplify right side
    2,278.86x = 2,798,332.10
  5. Step 5: Solve for x
    x = 2,798,332.10/2,278.86
  6. Step 6: Final answer
    x = 1,227.95

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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.