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Finding the Fourth Proportional to 3,187.54, 4,781.31 and 879.06

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Solution

The fourth proportional to 3,187.54, 4,781.31 and 879.06 is: 1,318.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.54 : 4,781.31 = 879.06 : x
  2. Step 2: Convert to fraction form
    3,187.54/4,781.31 = 879.06/x
  3. Step 3: Cross multiply
    3,187.54x = 4,781.31 × 879.06
  4. Step 4: Simplify right side
    3,187.54x = 4,203,058.37
  5. Step 5: Solve for x
    x = 4,203,058.37/3,187.54
  6. Step 6: Final answer
    x = 1,318.59

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1.5x scale

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.