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Finding the Fourth Proportional to 614.46, 921.60 and 306.30

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Solution

The fourth proportional to 614.46, 921.60 and 306.30 is: 459.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.46 : 921.60 = 306.30 : x
  2. Step 2: Convert to fraction form
    614.46/921.60 = 306.30/x
  3. Step 3: Cross multiply
    614.46x = 921.60 × 306.30
  4. Step 4: Simplify right side
    614.46x = 282,286.08
  5. Step 5: Solve for x
    x = 282,286.08/614.46
  6. Step 6: Final answer
    x = 459.41

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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.