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Finding the Fourth Proportional to 1,199.20, 1,799.04 and 505.87

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Solution

The fourth proportional to 1,199.20, 1,799.04 and 505.87 is: 758.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.20 : 1,799.04 = 505.87 : x
  2. Step 2: Convert to fraction form
    1,199.20/1,799.04 = 505.87/x
  3. Step 3: Cross multiply
    1,199.20x = 1,799.04 × 505.87
  4. Step 4: Simplify right side
    1,199.20x = 910,077.76
  5. Step 5: Solve for x
    x = 910,077.76/1,199.20
  6. Step 6: Final answer
    x = 758.90

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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.