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Finding the Fourth Proportional to 290.06, 400.29 and 202.79

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Solution

The fourth proportional to 290.06, 400.29 and 202.79 is: 279.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.06 : 400.29 = 202.79 : x
  2. Step 2: Convert to fraction form
    290.06/400.29 = 202.79/x
  3. Step 3: Cross multiply
    290.06x = 400.29 × 202.79
  4. Step 4: Simplify right side
    290.06x = 81,172.81
  5. Step 5: Solve for x
    x = 81,172.81/290.06
  6. Step 6: Final answer
    x = 279.85

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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.