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Finding the Fourth Proportional to 3,991.53, 5,985.12 and 2,585.79

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Solution

The fourth proportional to 3,991.53, 5,985.12 and 2,585.79 is: 3,877.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.53 : 5,985.12 = 2,585.79 : x
  2. Step 2: Convert to fraction form
    3,991.53/5,985.12 = 2,585.79/x
  3. Step 3: Cross multiply
    3,991.53x = 5,985.12 × 2,585.79
  4. Step 4: Simplify right side
    3,991.53x = 15,476,234.26
  5. Step 5: Solve for x
    x = 15,476,234.26/3,991.53
  6. Step 6: Final answer
    x = 3,877.27

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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.