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Finding the Fourth Proportional to 353.39, 529.07 and 261.65

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Solution

The fourth proportional to 353.39, 529.07 and 261.65 is: 391.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.39 : 529.07 = 261.65 : x
  2. Step 2: Convert to fraction form
    353.39/529.07 = 261.65/x
  3. Step 3: Cross multiply
    353.39x = 529.07 × 261.65
  4. Step 4: Simplify right side
    353.39x = 138,431.18
  5. Step 5: Solve for x
    x = 138,431.18/353.39
  6. Step 6: Final answer
    x = 391.73

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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.