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Finding the Fourth Proportional to 369.70, 509.88 and 222.30

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Solution

The fourth proportional to 369.70, 509.88 and 222.30 is: 306.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.70 : 509.88 = 222.30 : x
  2. Step 2: Convert to fraction form
    369.70/509.88 = 222.30/x
  3. Step 3: Cross multiply
    369.70x = 509.88 × 222.30
  4. Step 4: Simplify right side
    369.70x = 113,346.32
  5. Step 5: Solve for x
    x = 113,346.32/369.70
  6. Step 6: Final answer
    x = 306.59

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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.