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Finding the Fourth Proportional to 553.59, 763.79 and 343.71

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Solution

The fourth proportional to 553.59, 763.79 and 343.71 is: 474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.59 : 763.79 = 343.71 : x
  2. Step 2: Convert to fraction form
    553.59/763.79 = 343.71/x
  3. Step 3: Cross multiply
    553.59x = 763.79 × 343.71
  4. Step 4: Simplify right side
    553.59x = 262,520.54
  5. Step 5: Solve for x
    x = 262,520.54/553.59
  6. Step 6: Final answer
    x = 474.21

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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.