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Finding the Fourth Proportional to 319.37, 479.14 and 165.40

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Solution

The fourth proportional to 319.37, 479.14 and 165.40 is: 248.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.37 : 479.14 = 165.40 : x
  2. Step 2: Convert to fraction form
    319.37/479.14 = 165.40/x
  3. Step 3: Cross multiply
    319.37x = 479.14 × 165.40
  4. Step 4: Simplify right side
    319.37x = 79,248.14
  5. Step 5: Solve for x
    x = 79,248.14/319.37
  6. Step 6: Final answer
    x = 248.14

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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.