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Finding the Fourth Proportional to 355.19, 531.77 and 238.95

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Solution

The fourth proportional to 355.19, 531.77 and 238.95 is: 357.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.19 : 531.77 = 238.95 : x
  2. Step 2: Convert to fraction form
    355.19/531.77 = 238.95/x
  3. Step 3: Cross multiply
    355.19x = 531.77 × 238.95
  4. Step 4: Simplify right side
    355.19x = 127,065.25
  5. Step 5: Solve for x
    x = 127,065.25/355.19
  6. Step 6: Final answer
    x = 357.74

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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.