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Finding the Fourth Proportional to 359.85, 539.78 and 103.35

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Solution

The fourth proportional to 359.85, 539.78 and 103.35 is: 155.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.85 : 539.78 = 103.35 : x
  2. Step 2: Convert to fraction form
    359.85/539.78 = 103.35/x
  3. Step 3: Cross multiply
    359.85x = 539.78 × 103.35
  4. Step 4: Simplify right side
    359.85x = 55,785.75
  5. Step 5: Solve for x
    x = 55,785.75/359.85
  6. Step 6: Final answer
    x = 155.03

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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.