Home / 1,991.20-2,985.96-1,066.56

Finding the Fourth Proportional to 1,991.20, 2,985.96 and 1,066.56

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Solution

The fourth proportional to 1,991.20, 2,985.96 and 1,066.56 is: 1,599.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.20 : 2,985.96 = 1,066.56 : x
  2. Step 2: Convert to fraction form
    1,991.20/2,985.96 = 1,066.56/x
  3. Step 3: Cross multiply
    1,991.20x = 2,985.96 × 1,066.56
  4. Step 4: Simplify right side
    1,991.20x = 3,184,705.50
  5. Step 5: Solve for x
    x = 3,184,705.50/1,991.20
  6. Step 6: Final answer
    x = 1,599.39

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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.