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Finding the Fourth Proportional to 251.93, 347.81 and 199.55

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Solution

The fourth proportional to 251.93, 347.81 and 199.55 is: 275.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.93 : 347.81 = 199.55 : x
  2. Step 2: Convert to fraction form
    251.93/347.81 = 199.55/x
  3. Step 3: Cross multiply
    251.93x = 347.81 × 199.55
  4. Step 4: Simplify right side
    251.93x = 69,402.75
  5. Step 5: Solve for x
    x = 69,402.75/251.93
  6. Step 6: Final answer
    x = 275.49

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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.