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Finding the Fourth Proportional to 264.87, 397.10 and 127.78

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Solution

The fourth proportional to 264.87, 397.10 and 127.78 is: 191.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.87 : 397.10 = 127.78 : x
  2. Step 2: Convert to fraction form
    264.87/397.10 = 127.78/x
  3. Step 3: Cross multiply
    264.87x = 397.10 × 127.78
  4. Step 4: Simplify right side
    264.87x = 50,740.76
  5. Step 5: Solve for x
    x = 50,740.76/264.87
  6. Step 6: Final answer
    x = 191.57

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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.