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Finding the Fourth Proportional to 553.05, 763.19 and 331.87

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Solution

The fourth proportional to 553.05, 763.19 and 331.87 is: 457.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.05 : 763.19 = 331.87 : x
  2. Step 2: Convert to fraction form
    553.05/763.19 = 331.87/x
  3. Step 3: Cross multiply
    553.05x = 763.19 × 331.87
  4. Step 4: Simplify right side
    553.05x = 253,281.65
  5. Step 5: Solve for x
    x = 253,281.65/553.05
  6. Step 6: Final answer
    x = 457.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.