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Finding the Fourth Proportional to 2,101.78, 3,152.84 and 868.96

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Solution

The fourth proportional to 2,101.78, 3,152.84 and 868.96 is: 1,303.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.78 : 3,152.84 = 868.96 : x
  2. Step 2: Convert to fraction form
    2,101.78/3,152.84 = 868.96/x
  3. Step 3: Cross multiply
    2,101.78x = 3,152.84 × 868.96
  4. Step 4: Simplify right side
    2,101.78x = 2,739,691.85
  5. Step 5: Solve for x
    x = 2,739,691.85/2,101.78
  6. Step 6: Final answer
    x = 1,303.51

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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.