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Finding the Fourth Proportional to 2,154.80, 3,230.28 and 855.92

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Solution

The fourth proportional to 2,154.80, 3,230.28 and 855.92 is: 1,283.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.80 : 3,230.28 = 855.92 : x
  2. Step 2: Convert to fraction form
    2,154.80/3,230.28 = 855.92/x
  3. Step 3: Cross multiply
    2,154.80x = 3,230.28 × 855.92
  4. Step 4: Simplify right side
    2,154.80x = 2,764,861.26
  5. Step 5: Solve for x
    x = 2,764,861.26/2,154.80
  6. Step 6: Final answer
    x = 1,283.12

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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.