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Finding the Fourth Proportional to 358.94, 538.44 and 127.82

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Solution

The fourth proportional to 358.94, 538.44 and 127.82 is: 191.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.94 : 538.44 = 127.82 : x
  2. Step 2: Convert to fraction form
    358.94/538.44 = 127.82/x
  3. Step 3: Cross multiply
    358.94x = 538.44 × 127.82
  4. Step 4: Simplify right side
    358.94x = 68,823.40
  5. Step 5: Solve for x
    x = 68,823.40/358.94
  6. Step 6: Final answer
    x = 191.74

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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.