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Finding the Fourth Proportional to 614.40, 921.40 and 224.35

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Solution

The fourth proportional to 614.40, 921.40 and 224.35 is: 336.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.40 : 921.40 = 224.35 : x
  2. Step 2: Convert to fraction form
    614.40/921.40 = 224.35/x
  3. Step 3: Cross multiply
    614.40x = 921.40 × 224.35
  4. Step 4: Simplify right side
    614.40x = 206,716.09
  5. Step 5: Solve for x
    x = 206,716.09/614.40
  6. Step 6: Final answer
    x = 336.45

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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.