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Finding the Fourth Proportional to 326.91, 491.05 and 275.65

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Solution

The fourth proportional to 326.91, 491.05 and 275.65 is: 414.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.91 : 491.05 = 275.65 : x
  2. Step 2: Convert to fraction form
    326.91/491.05 = 275.65/x
  3. Step 3: Cross multiply
    326.91x = 491.05 × 275.65
  4. Step 4: Simplify right side
    326.91x = 135,356.55
  5. Step 5: Solve for x
    x = 135,356.55/326.91
  6. Step 6: Final answer
    x = 414.05

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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.