Home / 2,278.60-3,417.89-817.85

Finding the Fourth Proportional to 2,278.60, 3,417.89 and 817.85

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Solution

The fourth proportional to 2,278.60, 3,417.89 and 817.85 is: 1,226.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.60 : 3,417.89 = 817.85 : x
  2. Step 2: Convert to fraction form
    2,278.60/3,417.89 = 817.85/x
  3. Step 3: Cross multiply
    2,278.60x = 3,417.89 × 817.85
  4. Step 4: Simplify right side
    2,278.60x = 2,795,317.25
  5. Step 5: Solve for x
    x = 2,795,317.25/2,278.60
  6. Step 6: Final answer
    x = 1,226.77

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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.