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Finding the Fourth Proportional to 553.10, 763.10 and 320.24

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Solution

The fourth proportional to 553.10, 763.10 and 320.24 is: 441.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.10 : 763.10 = 320.24 : x
  2. Step 2: Convert to fraction form
    553.10/763.10 = 320.24/x
  3. Step 3: Cross multiply
    553.10x = 763.10 × 320.24
  4. Step 4: Simplify right side
    553.10x = 244,375.14
  5. Step 5: Solve for x
    x = 244,375.14/553.10
  6. Step 6: Final answer
    x = 441.83

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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.