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Finding the Fourth Proportional to 319.63, 476.76 and 271.24

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Solution

The fourth proportional to 319.63, 476.76 and 271.24 is: 404.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.63 : 476.76 = 271.24 : x
  2. Step 2: Convert to fraction form
    319.63/476.76 = 271.24/x
  3. Step 3: Cross multiply
    319.63x = 476.76 × 271.24
  4. Step 4: Simplify right side
    319.63x = 129,316.38
  5. Step 5: Solve for x
    x = 129,316.38/319.63
  6. Step 6: Final answer
    x = 404.58

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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.