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Finding the Fourth Proportional to 904.22, 1,249.52 and 682.78

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Solution

The fourth proportional to 904.22, 1,249.52 and 682.78 is: 943.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.22 : 1,249.52 = 682.78 : x
  2. Step 2: Convert to fraction form
    904.22/1,249.52 = 682.78/x
  3. Step 3: Cross multiply
    904.22x = 1,249.52 × 682.78
  4. Step 4: Simplify right side
    904.22x = 853,147.27
  5. Step 5: Solve for x
    x = 853,147.27/904.22
  6. Step 6: Final answer
    x = 943.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.