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Finding the Fourth Proportional to 369.28, 509.44 and 280.88

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Solution

The fourth proportional to 369.28, 509.44 and 280.88 is: 387.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.28 : 509.44 = 280.88 : x
  2. Step 2: Convert to fraction form
    369.28/509.44 = 280.88/x
  3. Step 3: Cross multiply
    369.28x = 509.44 × 280.88
  4. Step 4: Simplify right side
    369.28x = 143,091.51
  5. Step 5: Solve for x
    x = 143,091.51/369.28
  6. Step 6: Final answer
    x = 387.49

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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.