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Finding the Fourth Proportional to 279.66, 418.67 and 202.71

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Solution

The fourth proportional to 279.66, 418.67 and 202.71 is: 303.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.66 : 418.67 = 202.71 : x
  2. Step 2: Convert to fraction form
    279.66/418.67 = 202.71/x
  3. Step 3: Cross multiply
    279.66x = 418.67 × 202.71
  4. Step 4: Simplify right side
    279.66x = 84,868.60
  5. Step 5: Solve for x
    x = 84,868.60/279.66
  6. Step 6: Final answer
    x = 303.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.