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Finding the Fourth Proportional to 250.16, 345.48 and 198.80

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Solution

The fourth proportional to 250.16, 345.48 and 198.80 is: 274.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.16 : 345.48 = 198.80 : x
  2. Step 2: Convert to fraction form
    250.16/345.48 = 198.80/x
  3. Step 3: Cross multiply
    250.16x = 345.48 × 198.80
  4. Step 4: Simplify right side
    250.16x = 68,681.42
  5. Step 5: Solve for x
    x = 68,681.42/250.16
  6. Step 6: Final answer
    x = 274.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.