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Finding the Fourth Proportional to 3,991.69, 5,988.26 and 1,359.06

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Solution

The fourth proportional to 3,991.69, 5,988.26 and 1,359.06 is: 2,038.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.69 : 5,988.26 = 1,359.06 : x
  2. Step 2: Convert to fraction form
    3,991.69/5,988.26 = 1,359.06/x
  3. Step 3: Cross multiply
    3,991.69x = 5,988.26 × 1,359.06
  4. Step 4: Simplify right side
    3,991.69x = 8,138,405.49
  5. Step 5: Solve for x
    x = 8,138,405.49/3,991.69
  6. Step 6: Final answer
    x = 2,038.84

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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.