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Finding the Fourth Proportional to 553.34, 763.85 and 343.46

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Solution

The fourth proportional to 553.34, 763.85 and 343.46 is: 474.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.34 : 763.85 = 343.46 : x
  2. Step 2: Convert to fraction form
    553.34/763.85 = 343.46/x
  3. Step 3: Cross multiply
    553.34x = 763.85 × 343.46
  4. Step 4: Simplify right side
    553.34x = 262,354.69
  5. Step 5: Solve for x
    x = 262,354.69/553.34
  6. Step 6: Final answer
    x = 474.13

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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.