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Finding the Fourth Proportional to 1,079.37, 1,620.68 and 617.67

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Solution

The fourth proportional to 1,079.37, 1,620.68 and 617.67 is: 927.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.37 : 1,620.68 = 617.67 : x
  2. Step 2: Convert to fraction form
    1,079.37/1,620.68 = 617.67/x
  3. Step 3: Cross multiply
    1,079.37x = 1,620.68 × 617.67
  4. Step 4: Simplify right side
    1,079.37x = 1,001,042.33
  5. Step 5: Solve for x
    x = 1,001,042.33/1,079.37
  6. Step 6: Final answer
    x = 927.43

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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.