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Finding the Fourth Proportional to 369.90, 510.17 and 238.68

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Solution

The fourth proportional to 369.90, 510.17 and 238.68 is: 329.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.90 : 510.17 = 238.68 : x
  2. Step 2: Convert to fraction form
    369.90/510.17 = 238.68/x
  3. Step 3: Cross multiply
    369.90x = 510.17 × 238.68
  4. Step 4: Simplify right side
    369.90x = 121,767.38
  5. Step 5: Solve for x
    x = 121,767.38/369.90
  6. Step 6: Final answer
    x = 329.19

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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.