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Finding the Fourth Proportional to 493.90, 740.78 and 169.22

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Solution

The fourth proportional to 493.90, 740.78 and 169.22 is: 253.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.90 : 740.78 = 169.22 : x
  2. Step 2: Convert to fraction form
    493.90/740.78 = 169.22/x
  3. Step 3: Cross multiply
    493.90x = 740.78 × 169.22
  4. Step 4: Simplify right side
    493.90x = 125,354.79
  5. Step 5: Solve for x
    x = 125,354.79/493.90
  6. Step 6: Final answer
    x = 253.81

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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.