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Finding the Fourth Proportional to 359.09, 495.45 and 211.70

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Solution

The fourth proportional to 359.09, 495.45 and 211.70 is: 292.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.09 : 495.45 = 211.70 : x
  2. Step 2: Convert to fraction form
    359.09/495.45 = 211.70/x
  3. Step 3: Cross multiply
    359.09x = 495.45 × 211.70
  4. Step 4: Simplify right side
    359.09x = 104,886.77
  5. Step 5: Solve for x
    x = 104,886.77/359.09
  6. Step 6: Final answer
    x = 292.09

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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.