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Finding the Fourth Proportional to 326.75, 491.15 and 302.15

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Solution

The fourth proportional to 326.75, 491.15 and 302.15 is: 454.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.75 : 491.15 = 302.15 : x
  2. Step 2: Convert to fraction form
    326.75/491.15 = 302.15/x
  3. Step 3: Cross multiply
    326.75x = 491.15 × 302.15
  4. Step 4: Simplify right side
    326.75x = 148,399.27
  5. Step 5: Solve for x
    x = 148,399.27/326.75
  6. Step 6: Final answer
    x = 454.17

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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.