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Finding the Fourth Proportional to 199.12, 297.40 and 162.64

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Solution

The fourth proportional to 199.12, 297.40 and 162.64 is: 242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.12 : 297.40 = 162.64 : x
  2. Step 2: Convert to fraction form
    199.12/297.40 = 162.64/x
  3. Step 3: Cross multiply
    199.12x = 297.40 × 162.64
  4. Step 4: Simplify right side
    199.12x = 48,369.14
  5. Step 5: Solve for x
    x = 48,369.14/199.12
  6. Step 6: Final answer
    x = 242.91

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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.