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Finding the Fourth Proportional to 476.80, 658.26 and 310.94

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Solution

The fourth proportional to 476.80, 658.26 and 310.94 is: 429.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.80 : 658.26 = 310.94 : x
  2. Step 2: Convert to fraction form
    476.80/658.26 = 310.94/x
  3. Step 3: Cross multiply
    476.80x = 658.26 × 310.94
  4. Step 4: Simplify right side
    476.80x = 204,679.36
  5. Step 5: Solve for x
    x = 204,679.36/476.80
  6. Step 6: Final answer
    x = 429.28

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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.