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Finding the Fourth Proportional to 2,606.36, 3,909.92 and 757.49

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Solution

The fourth proportional to 2,606.36, 3,909.92 and 757.49 is: 1,136.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,606.36 : 3,909.92 = 757.49 : x
  2. Step 2: Convert to fraction form
    2,606.36/3,909.92 = 757.49/x
  3. Step 3: Cross multiply
    2,606.36x = 3,909.92 × 757.49
  4. Step 4: Simplify right side
    2,606.36x = 2,961,701.96
  5. Step 5: Solve for x
    x = 2,961,701.96/2,606.36
  6. Step 6: Final answer
    x = 1,136.34

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1.5x scale

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.