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Finding the Fourth Proportional to 319.68, 476.82 and 311.04

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Solution

The fourth proportional to 319.68, 476.82 and 311.04 is: 463.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.68 : 476.82 = 311.04 : x
  2. Step 2: Convert to fraction form
    319.68/476.82 = 311.04/x
  3. Step 3: Cross multiply
    319.68x = 476.82 × 311.04
  4. Step 4: Simplify right side
    319.68x = 148,310.09
  5. Step 5: Solve for x
    x = 148,310.09/319.68
  6. Step 6: Final answer
    x = 463.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.