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Finding the Fourth Proportional to 325.62, 490.73 and 322.79

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Solution

The fourth proportional to 325.62, 490.73 and 322.79 is: 486.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.62 : 490.73 = 322.79 : x
  2. Step 2: Convert to fraction form
    325.62/490.73 = 322.79/x
  3. Step 3: Cross multiply
    325.62x = 490.73 × 322.79
  4. Step 4: Simplify right side
    325.62x = 158,398.67
  5. Step 5: Solve for x
    x = 158,398.67/325.62
  6. Step 6: Final answer
    x = 486.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.