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Finding the Fourth Proportional to 1,351.56, 2,026.11 and 485.67

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Solution

The fourth proportional to 1,351.56, 2,026.11 and 485.67 is: 728.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.56 : 2,026.11 = 485.67 : x
  2. Step 2: Convert to fraction form
    1,351.56/2,026.11 = 485.67/x
  3. Step 3: Cross multiply
    1,351.56x = 2,026.11 × 485.67
  4. Step 4: Simplify right side
    1,351.56x = 984,020.84
  5. Step 5: Solve for x
    x = 984,020.84/1,351.56
  6. Step 6: Final answer
    x = 728.06

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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.