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Finding the Fourth Proportional to 369.56, 509.94 and 212.20

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Solution

The fourth proportional to 369.56, 509.94 and 212.20 is: 292.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.56 : 509.94 = 212.20 : x
  2. Step 2: Convert to fraction form
    369.56/509.94 = 212.20/x
  3. Step 3: Cross multiply
    369.56x = 509.94 × 212.20
  4. Step 4: Simplify right side
    369.56x = 108,209.27
  5. Step 5: Solve for x
    x = 108,209.27/369.56
  6. Step 6: Final answer
    x = 292.81

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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.