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Finding the Fourth Proportional to 377.68, 521.52 and 261.52

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Solution

The fourth proportional to 377.68, 521.52 and 261.52 is: 361.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.68 : 521.52 = 261.52 : x
  2. Step 2: Convert to fraction form
    377.68/521.52 = 261.52/x
  3. Step 3: Cross multiply
    377.68x = 521.52 × 261.52
  4. Step 4: Simplify right side
    377.68x = 136,387.91
  5. Step 5: Solve for x
    x = 136,387.91/377.68
  6. Step 6: Final answer
    x = 361.12

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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.