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Finding the Fourth Proportional to 287.06, 396.33 and 199.94

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Solution

The fourth proportional to 287.06, 396.33 and 199.94 is: 276.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.06 : 396.33 = 199.94 : x
  2. Step 2: Convert to fraction form
    287.06/396.33 = 199.94/x
  3. Step 3: Cross multiply
    287.06x = 396.33 × 199.94
  4. Step 4: Simplify right side
    287.06x = 79,242.22
  5. Step 5: Solve for x
    x = 79,242.22/287.06
  6. Step 6: Final answer
    x = 276.05

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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.