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Finding the Fourth Proportional to 1,241.91, 1,713.24 and 905.09

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Solution

The fourth proportional to 1,241.91, 1,713.24 and 905.09 is: 1,248.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.91 : 1,713.24 = 905.09 : x
  2. Step 2: Convert to fraction form
    1,241.91/1,713.24 = 905.09/x
  3. Step 3: Cross multiply
    1,241.91x = 1,713.24 × 905.09
  4. Step 4: Simplify right side
    1,241.91x = 1,550,630.98
  5. Step 5: Solve for x
    x = 1,550,630.98/1,241.91
  6. Step 6: Final answer
    x = 1,248.59

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Double scale
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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.