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Finding the Fourth Proportional to 3,187.97, 4,782.23 and 879.47

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Solution

The fourth proportional to 3,187.97, 4,782.23 and 879.47 is: 1,319.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.97 : 4,782.23 = 879.47 : x
  2. Step 2: Convert to fraction form
    3,187.97/4,782.23 = 879.47/x
  3. Step 3: Cross multiply
    3,187.97x = 4,782.23 × 879.47
  4. Step 4: Simplify right side
    3,187.97x = 4,205,820.74
  5. Step 5: Solve for x
    x = 4,205,820.74/3,187.97
  6. Step 6: Final answer
    x = 1,319.28

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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.