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Finding the Fourth Proportional to 493.89, 741.78 and 424.65

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Solution

The fourth proportional to 493.89, 741.78 and 424.65 is: 637.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.89 : 741.78 = 424.65 : x
  2. Step 2: Convert to fraction form
    493.89/741.78 = 424.65/x
  3. Step 3: Cross multiply
    493.89x = 741.78 × 424.65
  4. Step 4: Simplify right side
    493.89x = 314,996.88
  5. Step 5: Solve for x
    x = 314,996.88/493.89
  6. Step 6: Final answer
    x = 637.79

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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.