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Finding the Fourth Proportional to 906.11, 1,249.91 and 513.06

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Solution

The fourth proportional to 906.11, 1,249.91 and 513.06 is: 707.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.11 : 1,249.91 = 513.06 : x
  2. Step 2: Convert to fraction form
    906.11/1,249.91 = 513.06/x
  3. Step 3: Cross multiply
    906.11x = 1,249.91 × 513.06
  4. Step 4: Simplify right side
    906.11x = 641,277.54
  5. Step 5: Solve for x
    x = 641,277.54/906.11
  6. Step 6: Final answer
    x = 707.72

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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.