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Finding the Fourth Proportional to 1,768.15, 2,650.20 and 878.23

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Solution

The fourth proportional to 1,768.15, 2,650.20 and 878.23 is: 1,316.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.15 : 2,650.20 = 878.23 : x
  2. Step 2: Convert to fraction form
    1,768.15/2,650.20 = 878.23/x
  3. Step 3: Cross multiply
    1,768.15x = 2,650.20 × 878.23
  4. Step 4: Simplify right side
    1,768.15x = 2,327,485.15
  5. Step 5: Solve for x
    x = 2,327,485.15/1,768.15
  6. Step 6: Final answer
    x = 1,316.34

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Similar ratio
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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.