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Finding the Fourth Proportional to 553.46, 763.55 and 343.57

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Solution

The fourth proportional to 553.46, 763.55 and 343.57 is: 473.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.46 : 763.55 = 343.57 : x
  2. Step 2: Convert to fraction form
    553.46/763.55 = 343.57/x
  3. Step 3: Cross multiply
    553.46x = 763.55 × 343.57
  4. Step 4: Simplify right side
    553.46x = 262,327.34
  5. Step 5: Solve for x
    x = 262,327.34/553.46
  6. Step 6: Final answer
    x = 473.98

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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.