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Finding the Fourth Proportional to 358.84, 538.53 and 142.57

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Solution

The fourth proportional to 358.84, 538.53 and 142.57 is: 213.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.84 : 538.53 = 142.57 : x
  2. Step 2: Convert to fraction form
    358.84/538.53 = 142.57/x
  3. Step 3: Cross multiply
    358.84x = 538.53 × 142.57
  4. Step 4: Simplify right side
    358.84x = 76,778.22
  5. Step 5: Solve for x
    x = 76,778.22/358.84
  6. Step 6: Final answer
    x = 213.96

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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.