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Finding the Fourth Proportional to 358.81, 538.18 and 185.38

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Solution

The fourth proportional to 358.81, 538.18 and 185.38 is: 278.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.81 : 538.18 = 185.38 : x
  2. Step 2: Convert to fraction form
    358.81/538.18 = 185.38/x
  3. Step 3: Cross multiply
    358.81x = 538.18 × 185.38
  4. Step 4: Simplify right side
    358.81x = 99,767.81
  5. Step 5: Solve for x
    x = 99,767.81/358.81
  6. Step 6: Final answer
    x = 278.05

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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.