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Finding the Fourth Proportional to 905.22, 1,250.88 and 683.79

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Solution

The fourth proportional to 905.22, 1,250.88 and 683.79 is: 944.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.22 : 1,250.88 = 683.79 : x
  2. Step 2: Convert to fraction form
    905.22/1,250.88 = 683.79/x
  3. Step 3: Cross multiply
    905.22x = 1,250.88 × 683.79
  4. Step 4: Simplify right side
    905.22x = 855,339.24
  5. Step 5: Solve for x
    x = 855,339.24/905.22
  6. Step 6: Final answer
    x = 944.90

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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.