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Finding the Fourth Proportional to 199.64, 297.75 and 196.40

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Solution

The fourth proportional to 199.64, 297.75 and 196.40 is: 292.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.64 : 297.75 = 196.40 : x
  2. Step 2: Convert to fraction form
    199.64/297.75 = 196.40/x
  3. Step 3: Cross multiply
    199.64x = 297.75 × 196.40
  4. Step 4: Simplify right side
    199.64x = 58,478.10
  5. Step 5: Solve for x
    x = 58,478.10/199.64
  6. Step 6: Final answer
    x = 292.92

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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.