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Finding the Fourth Proportional to 553.24, 763.42 and 320.28

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Solution

The fourth proportional to 553.24, 763.42 and 320.28 is: 441.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.24 : 763.42 = 320.28 : x
  2. Step 2: Convert to fraction form
    553.24/763.42 = 320.28/x
  3. Step 3: Cross multiply
    553.24x = 763.42 × 320.28
  4. Step 4: Simplify right side
    553.24x = 244,508.16
  5. Step 5: Solve for x
    x = 244,508.16/553.24
  6. Step 6: Final answer
    x = 441.96

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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.