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Finding the Fourth Proportional to 359.76, 496.38 and 212.40

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Solution

The fourth proportional to 359.76, 496.38 and 212.40 is: 293.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.76 : 496.38 = 212.40 : x
  2. Step 2: Convert to fraction form
    359.76/496.38 = 212.40/x
  3. Step 3: Cross multiply
    359.76x = 496.38 × 212.40
  4. Step 4: Simplify right side
    359.76x = 105,428.63
  5. Step 5: Solve for x
    x = 105,428.63/359.76
  6. Step 6: Final answer
    x = 293.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.