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Finding the Fourth Proportional to 1,299.70, 1,949.55 and 883.90

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Solution

The fourth proportional to 1,299.70, 1,949.55 and 883.90 is: 1,325.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.70 : 1,949.55 = 883.90 : x
  2. Step 2: Convert to fraction form
    1,299.70/1,949.55 = 883.90/x
  3. Step 3: Cross multiply
    1,299.70x = 1,949.55 × 883.90
  4. Step 4: Simplify right side
    1,299.70x = 1,723,207.25
  5. Step 5: Solve for x
    x = 1,723,207.25/1,299.70
  6. Step 6: Final answer
    x = 1,325.85

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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.