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Finding the Fourth Proportional to 348.81, 521.99 and 239.15

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Solution

The fourth proportional to 348.81, 521.99 and 239.15 is: 357.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.81 : 521.99 = 239.15 : x
  2. Step 2: Convert to fraction form
    348.81/521.99 = 239.15/x
  3. Step 3: Cross multiply
    348.81x = 521.99 × 239.15
  4. Step 4: Simplify right side
    348.81x = 124,836.26
  5. Step 5: Solve for x
    x = 124,836.26/348.81
  6. Step 6: Final answer
    x = 357.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.