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Finding the Fourth Proportional to 553.68, 763.98 and 343.91

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Solution

The fourth proportional to 553.68, 763.98 and 343.91 is: 474.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.68 : 763.98 = 343.91 : x
  2. Step 2: Convert to fraction form
    553.68/763.98 = 343.91/x
  3. Step 3: Cross multiply
    553.68x = 763.98 × 343.91
  4. Step 4: Simplify right side
    553.68x = 262,740.98
  5. Step 5: Solve for x
    x = 262,740.98/553.68
  6. Step 6: Final answer
    x = 474.54

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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.