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Finding the Fourth Proportional to 264.68, 397.03 and 191.78

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Solution

The fourth proportional to 264.68, 397.03 and 191.78 is: 287.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.68 : 397.03 = 191.78 : x
  2. Step 2: Convert to fraction form
    264.68/397.03 = 191.78/x
  3. Step 3: Cross multiply
    264.68x = 397.03 × 191.78
  4. Step 4: Simplify right side
    264.68x = 76,142.41
  5. Step 5: Solve for x
    x = 76,142.41/264.68
  6. Step 6: Final answer
    x = 287.68

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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.