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Finding the Fourth Proportional to 359.27, 538.20 and 320.57

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Solution

The fourth proportional to 359.27, 538.20 and 320.57 is: 480.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.27 : 538.20 = 320.57 : x
  2. Step 2: Convert to fraction form
    359.27/538.20 = 320.57/x
  3. Step 3: Cross multiply
    359.27x = 538.20 × 320.57
  4. Step 4: Simplify right side
    359.27x = 172,530.10
  5. Step 5: Solve for x
    x = 172,530.10/359.27
  6. Step 6: Final answer
    x = 480.23

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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.