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Finding the Fourth Proportional to 379.16, 522.98 and 239.45

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Solution

The fourth proportional to 379.16, 522.98 and 239.45 is: 330.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.16 : 522.98 = 239.45 : x
  2. Step 2: Convert to fraction form
    379.16/522.98 = 239.45/x
  3. Step 3: Cross multiply
    379.16x = 522.98 × 239.45
  4. Step 4: Simplify right side
    379.16x = 125,223.75
  5. Step 5: Solve for x
    x = 125,223.75/379.16
  6. Step 6: Final answer
    x = 330.27

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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.