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Finding the Fourth Proportional to 326.29, 487.11 and 314.90

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Solution

The fourth proportional to 326.29, 487.11 and 314.90 is: 470.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.29 : 487.11 = 314.90 : x
  2. Step 2: Convert to fraction form
    326.29/487.11 = 314.90/x
  3. Step 3: Cross multiply
    326.29x = 487.11 × 314.90
  4. Step 4: Simplify right side
    326.29x = 153,390.94
  5. Step 5: Solve for x
    x = 153,390.94/326.29
  6. Step 6: Final answer
    x = 470.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.