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Finding the Fourth Proportional to 369.20, 509.30 and 299.33

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Solution

The fourth proportional to 369.20, 509.30 and 299.33 is: 412.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.20 : 509.30 = 299.33 : x
  2. Step 2: Convert to fraction form
    369.20/509.30 = 299.33/x
  3. Step 3: Cross multiply
    369.20x = 509.30 × 299.33
  4. Step 4: Simplify right side
    369.20x = 152,447.27
  5. Step 5: Solve for x
    x = 152,447.27/369.20
  6. Step 6: Final answer
    x = 412.92

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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.