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Finding the Fourth Proportional to 906.08, 1,249.08 and 669.68

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Solution

The fourth proportional to 906.08, 1,249.08 and 669.68 is: 923.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.08 : 1,249.08 = 669.68 : x
  2. Step 2: Convert to fraction form
    906.08/1,249.08 = 669.68/x
  3. Step 3: Cross multiply
    906.08x = 1,249.08 × 669.68
  4. Step 4: Simplify right side
    906.08x = 836,483.89
  5. Step 5: Solve for x
    x = 836,483.89/906.08
  6. Step 6: Final answer
    x = 923.19

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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.