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Finding the Fourth Proportional to 3,991.76, 5,988.12 and 1,070.12

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Solution

The fourth proportional to 3,991.76, 5,988.12 and 1,070.12 is: 1,605.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.76 : 5,988.12 = 1,070.12 : x
  2. Step 2: Convert to fraction form
    3,991.76/5,988.12 = 1,070.12/x
  3. Step 3: Cross multiply
    3,991.76x = 5,988.12 × 1,070.12
  4. Step 4: Simplify right side
    3,991.76x = 6,408,006.97
  5. Step 5: Solve for x
    x = 6,408,006.97/3,991.76
  6. Step 6: Final answer
    x = 1,605.31

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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.