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Finding the Fourth Proportional to 614.20, 921.78 and 229.56

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Solution

The fourth proportional to 614.20, 921.78 and 229.56 is: 344.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.20 : 921.78 = 229.56 : x
  2. Step 2: Convert to fraction form
    614.20/921.78 = 229.56/x
  3. Step 3: Cross multiply
    614.20x = 921.78 × 229.56
  4. Step 4: Simplify right side
    614.20x = 211,603.82
  5. Step 5: Solve for x
    x = 211,603.82/614.20
  6. Step 6: Final answer
    x = 344.52

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1.5x scale

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.