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Finding the Fourth Proportional to 1,351.69, 2,027.67 and 485.94

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Solution

The fourth proportional to 1,351.69, 2,027.67 and 485.94 is: 728.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.69 : 2,027.67 = 485.94 : x
  2. Step 2: Convert to fraction form
    1,351.69/2,027.67 = 485.94/x
  3. Step 3: Cross multiply
    1,351.69x = 2,027.67 × 485.94
  4. Step 4: Simplify right side
    1,351.69x = 985,325.96
  5. Step 5: Solve for x
    x = 985,325.96/1,351.69
  6. Step 6: Final answer
    x = 728.96

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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.