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Finding the Fourth Proportional to 369.70, 510.21 and 238.81

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Solution

The fourth proportional to 369.70, 510.21 and 238.81 is: 329.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.70 : 510.21 = 238.81 : x
  2. Step 2: Convert to fraction form
    369.70/510.21 = 238.81/x
  3. Step 3: Cross multiply
    369.70x = 510.21 × 238.81
  4. Step 4: Simplify right side
    369.70x = 121,843.25
  5. Step 5: Solve for x
    x = 121,843.25/369.70
  6. Step 6: Final answer
    x = 329.57

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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.