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Finding the Fourth Proportional to 553.40, 830.42 and 481.72

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Solution

The fourth proportional to 553.40, 830.42 and 481.72 is: 722.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.40 : 830.42 = 481.72 : x
  2. Step 2: Convert to fraction form
    553.40/830.42 = 481.72/x
  3. Step 3: Cross multiply
    553.40x = 830.42 × 481.72
  4. Step 4: Simplify right side
    553.40x = 400,029.92
  5. Step 5: Solve for x
    x = 400,029.92/553.40
  6. Step 6: Final answer
    x = 722.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.