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Finding the Fourth Proportional to 359.40, 539.06 and 102.90

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Solution

The fourth proportional to 359.40, 539.06 and 102.90 is: 154.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.40 : 539.06 = 102.90 : x
  2. Step 2: Convert to fraction form
    359.40/539.06 = 102.90/x
  3. Step 3: Cross multiply
    359.40x = 539.06 × 102.90
  4. Step 4: Simplify right side
    359.40x = 55,469.27
  5. Step 5: Solve for x
    x = 55,469.27/359.40
  6. Step 6: Final answer
    x = 154.34

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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.