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Finding the Fourth Proportional to 358.72, 538.06 and 115.22

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Solution

The fourth proportional to 358.72, 538.06 and 115.22 is: 172.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.72 : 538.06 = 115.22 : x
  2. Step 2: Convert to fraction form
    358.72/538.06 = 115.22/x
  3. Step 3: Cross multiply
    358.72x = 538.06 × 115.22
  4. Step 4: Simplify right side
    358.72x = 61,995.27
  5. Step 5: Solve for x
    x = 61,995.27/358.72
  6. Step 6: Final answer
    x = 172.82

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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.