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Finding the Fourth Proportional to 319.95, 479.66 and 251.24

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Solution

The fourth proportional to 319.95, 479.66 and 251.24 is: 376.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.95 : 479.66 = 251.24 : x
  2. Step 2: Convert to fraction form
    319.95/479.66 = 251.24/x
  3. Step 3: Cross multiply
    319.95x = 479.66 × 251.24
  4. Step 4: Simplify right side
    319.95x = 120,506.12
  5. Step 5: Solve for x
    x = 120,506.12/319.95
  6. Step 6: Final answer
    x = 376.64

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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.