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Finding the Fourth Proportional to 470.96, 706.80 and 326.88

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Solution

The fourth proportional to 470.96, 706.80 and 326.88 is: 490.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.96 : 706.80 = 326.88 : x
  2. Step 2: Convert to fraction form
    470.96/706.80 = 326.88/x
  3. Step 3: Cross multiply
    470.96x = 706.80 × 326.88
  4. Step 4: Simplify right side
    470.96x = 231,038.78
  5. Step 5: Solve for x
    x = 231,038.78/470.96
  6. Step 6: Final answer
    x = 490.57

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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.