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Finding the Fourth Proportional to 3,167.72, 4,751.57 and 859.22

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Solution

The fourth proportional to 3,167.72, 4,751.57 and 859.22 is: 1,288.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,167.72 : 4,751.57 = 859.22 : x
  2. Step 2: Convert to fraction form
    3,167.72/4,751.57 = 859.22/x
  3. Step 3: Cross multiply
    3,167.72x = 4,751.57 × 859.22
  4. Step 4: Simplify right side
    3,167.72x = 4,082,622.37
  5. Step 5: Solve for x
    x = 4,082,622.37/3,167.72
  6. Step 6: Final answer
    x = 1,288.82

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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.