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Finding the Fourth Proportional to 452.46, 678.62 and 127.85

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Solution

The fourth proportional to 452.46, 678.62 and 127.85 is: 191.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.46 : 678.62 = 127.85 : x
  2. Step 2: Convert to fraction form
    452.46/678.62 = 127.85/x
  3. Step 3: Cross multiply
    452.46x = 678.62 × 127.85
  4. Step 4: Simplify right side
    452.46x = 86,760.19
  5. Step 5: Solve for x
    x = 86,760.19/452.46
  6. Step 6: Final answer
    x = 191.75

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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.