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Finding the Fourth Proportional to 905.04, 1,249.32 and 684.04

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Solution

The fourth proportional to 905.04, 1,249.32 and 684.04 is: 944.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.04 : 1,249.32 = 684.04 : x
  2. Step 2: Convert to fraction form
    905.04/1,249.32 = 684.04/x
  3. Step 3: Cross multiply
    905.04x = 1,249.32 × 684.04
  4. Step 4: Simplify right side
    905.04x = 854,584.85
  5. Step 5: Solve for x
    x = 854,584.85/905.04
  6. Step 6: Final answer
    x = 944.25

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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.