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Finding the Fourth Proportional to 614.43, 921.78 and 203.59

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Solution

The fourth proportional to 614.43, 921.78 and 203.59 is: 305.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.43 : 921.78 = 203.59 : x
  2. Step 2: Convert to fraction form
    614.43/921.78 = 203.59/x
  3. Step 3: Cross multiply
    614.43x = 921.78 × 203.59
  4. Step 4: Simplify right side
    614.43x = 187,665.19
  5. Step 5: Solve for x
    x = 187,665.19/614.43
  6. Step 6: Final answer
    x = 305.43

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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.