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Finding the Fourth Proportional to 319.20, 479.82 and 296.66

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Solution

The fourth proportional to 319.20, 479.82 and 296.66 is: 445.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.20 : 479.82 = 296.66 : x
  2. Step 2: Convert to fraction form
    319.20/479.82 = 296.66/x
  3. Step 3: Cross multiply
    319.20x = 479.82 × 296.66
  4. Step 4: Simplify right side
    319.20x = 142,343.40
  5. Step 5: Solve for x
    x = 142,343.40/319.20
  6. Step 6: Final answer
    x = 445.94

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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.