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Finding the Fourth Proportional to 452.29, 678.40 and 127.66

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Solution

The fourth proportional to 452.29, 678.40 and 127.66 is: 191.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.29 : 678.40 = 127.66 : x
  2. Step 2: Convert to fraction form
    452.29/678.40 = 127.66/x
  3. Step 3: Cross multiply
    452.29x = 678.40 × 127.66
  4. Step 4: Simplify right side
    452.29x = 86,606.24
  5. Step 5: Solve for x
    x = 86,606.24/452.29
  6. Step 6: Final answer
    x = 191.48

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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.