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Finding the Fourth Proportional to 614.58, 921.76 and 203.65

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Solution

The fourth proportional to 614.58, 921.76 and 203.65 is: 305.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.58 : 921.76 = 203.65 : x
  2. Step 2: Convert to fraction form
    614.58/921.76 = 203.65/x
  3. Step 3: Cross multiply
    614.58x = 921.76 × 203.65
  4. Step 4: Simplify right side
    614.58x = 187,716.42
  5. Step 5: Solve for x
    x = 187,716.42/614.58
  6. Step 6: Final answer
    x = 305.44

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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.