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Finding the Fourth Proportional to 3,991.49, 5,987.94 and 1,358.86

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Solution

The fourth proportional to 3,991.49, 5,987.94 and 1,358.86 is: 2,038.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.49 : 5,987.94 = 1,358.86 : x
  2. Step 2: Convert to fraction form
    3,991.49/5,987.94 = 1,358.86/x
  3. Step 3: Cross multiply
    3,991.49x = 5,987.94 × 1,358.86
  4. Step 4: Simplify right side
    3,991.49x = 8,136,735.41
  5. Step 5: Solve for x
    x = 8,136,735.41/3,991.49
  6. Step 6: Final answer
    x = 2,038.52

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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.