Home / 1,518.90-2,278.35-827.70

Finding the Fourth Proportional to 1,518.90, 2,278.35 and 827.70

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Solution

The fourth proportional to 1,518.90, 2,278.35 and 827.70 is: 1,241.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.90 : 2,278.35 = 827.70 : x
  2. Step 2: Convert to fraction form
    1,518.90/2,278.35 = 827.70/x
  3. Step 3: Cross multiply
    1,518.90x = 2,278.35 × 827.70
  4. Step 4: Simplify right side
    1,518.90x = 1,885,790.30
  5. Step 5: Solve for x
    x = 1,885,790.30/1,518.90
  6. Step 6: Final answer
    x = 1,241.55

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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.