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Finding the Fourth Proportional to 2,817.20, 4,226.20 and 868.88

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Solution

The fourth proportional to 2,817.20, 4,226.20 and 868.88 is: 1,303.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.20 : 4,226.20 = 868.88 : x
  2. Step 2: Convert to fraction form
    2,817.20/4,226.20 = 868.88/x
  3. Step 3: Cross multiply
    2,817.20x = 4,226.20 × 868.88
  4. Step 4: Simplify right side
    2,817.20x = 3,672,060.66
  5. Step 5: Solve for x
    x = 3,672,060.66/2,817.20
  6. Step 6: Final answer
    x = 1,303.44

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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.