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Finding the Fourth Proportional to 493.02, 739.11 and 261.78

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Solution

The fourth proportional to 493.02, 739.11 and 261.78 is: 392.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.02 : 739.11 = 261.78 : x
  2. Step 2: Convert to fraction form
    493.02/739.11 = 261.78/x
  3. Step 3: Cross multiply
    493.02x = 739.11 × 261.78
  4. Step 4: Simplify right side
    493.02x = 193,484.22
  5. Step 5: Solve for x
    x = 193,484.22/493.02
  6. Step 6: Final answer
    x = 392.45

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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.