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Finding the Fourth Proportional to 906.74, 1,357.07 and 667.96

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Solution

The fourth proportional to 906.74, 1,357.07 and 667.96 is: 999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.74 : 1,357.07 = 667.96 : x
  2. Step 2: Convert to fraction form
    906.74/1,357.07 = 667.96/x
  3. Step 3: Cross multiply
    906.74x = 1,357.07 × 667.96
  4. Step 4: Simplify right side
    906.74x = 906,465.50
  5. Step 5: Solve for x
    x = 906,465.50/906.74
  6. Step 6: Final answer
    x = 999.70

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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.