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Finding the Fourth Proportional to 468.31, 646.23 and 271.78

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Solution

The fourth proportional to 468.31, 646.23 and 271.78 is: 375.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.31 : 646.23 = 271.78 : x
  2. Step 2: Convert to fraction form
    468.31/646.23 = 271.78/x
  3. Step 3: Cross multiply
    468.31x = 646.23 × 271.78
  4. Step 4: Simplify right side
    468.31x = 175,632.39
  5. Step 5: Solve for x
    x = 175,632.39/468.31
  6. Step 6: Final answer
    x = 375.03

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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.