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Finding the Fourth Proportional to 464.40, 695.79 and 326.79

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Solution

The fourth proportional to 464.40, 695.79 and 326.79 is: 489.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.40 : 695.79 = 326.79 : x
  2. Step 2: Convert to fraction form
    464.40/695.79 = 326.79/x
  3. Step 3: Cross multiply
    464.40x = 695.79 × 326.79
  4. Step 4: Simplify right side
    464.40x = 227,377.21
  5. Step 5: Solve for x
    x = 227,377.21/464.40
  6. Step 6: Final answer
    x = 489.62

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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.