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Finding the Fourth Proportional to 614.47, 920.63 and 326.11

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Solution

The fourth proportional to 614.47, 920.63 and 326.11 is: 488.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.47 : 920.63 = 326.11 : x
  2. Step 2: Convert to fraction form
    614.47/920.63 = 326.11/x
  3. Step 3: Cross multiply
    614.47x = 920.63 × 326.11
  4. Step 4: Simplify right side
    614.47x = 300,226.65
  5. Step 5: Solve for x
    x = 300,226.65/614.47
  6. Step 6: Final answer
    x = 488.59

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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.