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Finding the Fourth Proportional to 621.57, 931.31 and 296.22

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Solution

The fourth proportional to 621.57, 931.31 and 296.22 is: 443.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.57 : 931.31 = 296.22 : x
  2. Step 2: Convert to fraction form
    621.57/931.31 = 296.22/x
  3. Step 3: Cross multiply
    621.57x = 931.31 × 296.22
  4. Step 4: Simplify right side
    621.57x = 275,871.17
  5. Step 5: Solve for x
    x = 275,871.17/621.57
  6. Step 6: Final answer
    x = 443.83

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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.