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Finding the Fourth Proportional to 1,199.24, 1,799.12 and 679.49

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Solution

The fourth proportional to 1,199.24, 1,799.12 and 679.49 is: 1,019.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.24 : 1,799.12 = 679.49 : x
  2. Step 2: Convert to fraction form
    1,199.24/1,799.12 = 679.49/x
  3. Step 3: Cross multiply
    1,199.24x = 1,799.12 × 679.49
  4. Step 4: Simplify right side
    1,199.24x = 1,222,478.40
  5. Step 5: Solve for x
    x = 1,222,478.40/1,199.24
  6. Step 6: Final answer
    x = 1,019.38

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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.