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Finding the Fourth Proportional to 699.50, 1,049.12 and 186.38

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Solution

The fourth proportional to 699.50, 1,049.12 and 186.38 is: 279.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.50 : 1,049.12 = 186.38 : x
  2. Step 2: Convert to fraction form
    699.50/1,049.12 = 186.38/x
  3. Step 3: Cross multiply
    699.50x = 1,049.12 × 186.38
  4. Step 4: Simplify right side
    699.50x = 195,530.21
  5. Step 5: Solve for x
    x = 195,530.21/699.50
  6. Step 6: Final answer
    x = 279.53

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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.