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Finding the Fourth Proportional to 377.82, 521.19 and 261.18

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Solution

The fourth proportional to 377.82, 521.19 and 261.18 is: 360.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.82 : 521.19 = 261.18 : x
  2. Step 2: Convert to fraction form
    377.82/521.19 = 261.18/x
  3. Step 3: Cross multiply
    377.82x = 521.19 × 261.18
  4. Step 4: Simplify right side
    377.82x = 136,124.40
  5. Step 5: Solve for x
    x = 136,124.40/377.82
  6. Step 6: Final answer
    x = 360.29

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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.