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Finding the Fourth Proportional to 493.19, 739.31 and 261.93

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Solution

The fourth proportional to 493.19, 739.31 and 261.93 is: 392.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.19 : 739.31 = 261.93 : x
  2. Step 2: Convert to fraction form
    493.19/739.31 = 261.93/x
  3. Step 3: Cross multiply
    493.19x = 739.31 × 261.93
  4. Step 4: Simplify right side
    493.19x = 193,645.17
  5. Step 5: Solve for x
    x = 193,645.17/493.19
  6. Step 6: Final answer
    x = 392.64

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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.