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Finding the Fourth Proportional to 389.19, 537.12 and 239.82

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Solution

The fourth proportional to 389.19, 537.12 and 239.82 is: 330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.19 : 537.12 = 239.82 : x
  2. Step 2: Convert to fraction form
    389.19/537.12 = 239.82/x
  3. Step 3: Cross multiply
    389.19x = 537.12 × 239.82
  4. Step 4: Simplify right side
    389.19x = 128,812.12
  5. Step 5: Solve for x
    x = 128,812.12/389.19
  6. Step 6: Final answer
    x = 330.97

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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.