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Finding the Fourth Proportional to 199.40, 297.30 and 195.75

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Solution

The fourth proportional to 199.40, 297.30 and 195.75 is: 291.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.40 : 297.30 = 195.75 : x
  2. Step 2: Convert to fraction form
    199.40/297.30 = 195.75/x
  3. Step 3: Cross multiply
    199.40x = 297.30 × 195.75
  4. Step 4: Simplify right side
    199.40x = 58,197.21
  5. Step 5: Solve for x
    x = 58,197.21/199.40
  6. Step 6: Final answer
    x = 291.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.