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Finding the Fourth Proportional to 359.94, 539.79 and 140.40

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Solution

The fourth proportional to 359.94, 539.79 and 140.40 is: 210.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.94 : 539.79 = 140.40 : x
  2. Step 2: Convert to fraction form
    359.94/539.79 = 140.40/x
  3. Step 3: Cross multiply
    359.94x = 539.79 × 140.40
  4. Step 4: Simplify right side
    359.94x = 75,786.52
  5. Step 5: Solve for x
    x = 75,786.52/359.94
  6. Step 6: Final answer
    x = 210.55

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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.