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Finding the Fourth Proportional to 331.88, 497.81 and 115.47

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Solution

The fourth proportional to 331.88, 497.81 and 115.47 is: 173.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.88 : 497.81 = 115.47 : x
  2. Step 2: Convert to fraction form
    331.88/497.81 = 115.47/x
  3. Step 3: Cross multiply
    331.88x = 497.81 × 115.47
  4. Step 4: Simplify right side
    331.88x = 57,482.41
  5. Step 5: Solve for x
    x = 57,482.41/331.88
  6. Step 6: Final answer
    x = 173.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.