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Finding the Fourth Proportional to 369.43, 509.37 and 306.43

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Solution

The fourth proportional to 369.43, 509.37 and 306.43 is: 422.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.43 : 509.37 = 306.43 : x
  2. Step 2: Convert to fraction form
    369.43/509.37 = 306.43/x
  3. Step 3: Cross multiply
    369.43x = 509.37 × 306.43
  4. Step 4: Simplify right side
    369.43x = 156,086.25
  5. Step 5: Solve for x
    x = 156,086.25/369.43
  6. Step 6: Final answer
    x = 422.51

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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.