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Finding the Fourth Proportional to 353.82, 530.86 and 261.73

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Solution

The fourth proportional to 353.82, 530.86 and 261.73 is: 392.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.82 : 530.86 = 261.73 : x
  2. Step 2: Convert to fraction form
    353.82/530.86 = 261.73/x
  3. Step 3: Cross multiply
    353.82x = 530.86 × 261.73
  4. Step 4: Simplify right side
    353.82x = 138,941.99
  5. Step 5: Solve for x
    x = 138,941.99/353.82
  6. Step 6: Final answer
    x = 392.69

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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.