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Finding the Fourth Proportional to 319.87, 479.40 and 204.27

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Solution

The fourth proportional to 319.87, 479.40 and 204.27 is: 306.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.87 : 479.40 = 204.27 : x
  2. Step 2: Convert to fraction form
    319.87/479.40 = 204.27/x
  3. Step 3: Cross multiply
    319.87x = 479.40 × 204.27
  4. Step 4: Simplify right side
    319.87x = 97,927.04
  5. Step 5: Solve for x
    x = 97,927.04/319.87
  6. Step 6: Final answer
    x = 306.15

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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.