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Finding the Fourth Proportional to 476.97, 658.34 and 290.56

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Solution

The fourth proportional to 476.97, 658.34 and 290.56 is: 401.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.97 : 658.34 = 290.56 : x
  2. Step 2: Convert to fraction form
    476.97/658.34 = 290.56/x
  3. Step 3: Cross multiply
    476.97x = 658.34 × 290.56
  4. Step 4: Simplify right side
    476.97x = 191,286.50
  5. Step 5: Solve for x
    x = 191,286.50/476.97
  6. Step 6: Final answer
    x = 401.05

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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.