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Finding the Fourth Proportional to 5,446.80, 8,170.20 and 5,158.80

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Solution

The fourth proportional to 5,446.80, 8,170.20 and 5,158.80 is: 7,738.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,446.80 : 8,170.20 = 5,158.80 : x
  2. Step 2: Convert to fraction form
    5,446.80/8,170.20 = 5,158.80/x
  3. Step 3: Cross multiply
    5,446.80x = 8,170.20 × 5,158.80
  4. Step 4: Simplify right side
    5,446.80x = 42,148,427.76
  5. Step 5: Solve for x
    x = 42,148,427.76/5,446.80
  6. Step 6: Final answer
    x = 7,738.20

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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.