Home / 2,278.17-3,418.74-817.20

Finding the Fourth Proportional to 2,278.17, 3,418.74 and 817.20

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Solution

The fourth proportional to 2,278.17, 3,418.74 and 817.20 is: 1,226.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.17 : 3,418.74 = 817.20 : x
  2. Step 2: Convert to fraction form
    2,278.17/3,418.74 = 817.20/x
  3. Step 3: Cross multiply
    2,278.17x = 3,418.74 × 817.20
  4. Step 4: Simplify right side
    2,278.17x = 2,793,794.33
  5. Step 5: Solve for x
    x = 2,793,794.33/2,278.17
  6. Step 6: Final answer
    x = 1,226.33

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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.