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Finding the Fourth Proportional to 359.48, 539.58 and 215.12

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Solution

The fourth proportional to 359.48, 539.58 and 215.12 is: 322.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.48 : 539.58 = 215.12 : x
  2. Step 2: Convert to fraction form
    359.48/539.58 = 215.12/x
  3. Step 3: Cross multiply
    359.48x = 539.58 × 215.12
  4. Step 4: Simplify right side
    359.48x = 116,074.45
  5. Step 5: Solve for x
    x = 116,074.45/359.48
  6. Step 6: Final answer
    x = 322.90

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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.