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Finding the Fourth Proportional to 614.96, 921.72 and 268.58

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Solution

The fourth proportional to 614.96, 921.72 and 268.58 is: 402.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.96 : 921.72 = 268.58 : x
  2. Step 2: Convert to fraction form
    614.96/921.72 = 268.58/x
  3. Step 3: Cross multiply
    614.96x = 921.72 × 268.58
  4. Step 4: Simplify right side
    614.96x = 247,555.56
  5. Step 5: Solve for x
    x = 247,555.56/614.96
  6. Step 6: Final answer
    x = 402.56

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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.