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Finding the Fourth Proportional to 319.57, 479.48 and 197.91

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Solution

The fourth proportional to 319.57, 479.48 and 197.91 is: 296.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.57 : 479.48 = 197.91 : x
  2. Step 2: Convert to fraction form
    319.57/479.48 = 197.91/x
  3. Step 3: Cross multiply
    319.57x = 479.48 × 197.91
  4. Step 4: Simplify right side
    319.57x = 94,892.90
  5. Step 5: Solve for x
    x = 94,892.90/319.57
  6. Step 6: Final answer
    x = 296.94

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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.