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Finding the Fourth Proportional to 614.24, 921.24 and 280.60

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Solution

The fourth proportional to 614.24, 921.24 and 280.60 is: 420.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.24 : 921.24 = 280.60 : x
  2. Step 2: Convert to fraction form
    614.24/921.24 = 280.60/x
  3. Step 3: Cross multiply
    614.24x = 921.24 × 280.60
  4. Step 4: Simplify right side
    614.24x = 258,504.56
  5. Step 5: Solve for x
    x = 258,504.56/614.24
  6. Step 6: Final answer
    x = 420.85

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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.