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Finding the Fourth Proportional to 331.82, 497.18 and 319.18

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Solution

The fourth proportional to 331.82, 497.18 and 319.18 is: 478.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.82 : 497.18 = 319.18 : x
  2. Step 2: Convert to fraction form
    331.82/497.18 = 319.18/x
  3. Step 3: Cross multiply
    331.82x = 497.18 × 319.18
  4. Step 4: Simplify right side
    331.82x = 158,689.91
  5. Step 5: Solve for x
    x = 158,689.91/331.82
  6. Step 6: Final answer
    x = 478.24

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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.