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Finding the Fourth Proportional to 1,199.38, 1,799.38 and 651.42

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Solution

The fourth proportional to 1,199.38, 1,799.38 and 651.42 is: 977.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.38 : 1,799.38 = 651.42 : x
  2. Step 2: Convert to fraction form
    1,199.38/1,799.38 = 651.42/x
  3. Step 3: Cross multiply
    1,199.38x = 1,799.38 × 651.42
  4. Step 4: Simplify right side
    1,199.38x = 1,172,152.12
  5. Step 5: Solve for x
    x = 1,172,152.12/1,199.38
  6. Step 6: Final answer
    x = 977.30

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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.