Home / 1,991.76-2,986.20-1,017.12

Finding the Fourth Proportional to 1,991.76, 2,986.20 and 1,017.12

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Solution

The fourth proportional to 1,991.76, 2,986.20 and 1,017.12 is: 1,524.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.76 : 2,986.20 = 1,017.12 : x
  2. Step 2: Convert to fraction form
    1,991.76/2,986.20 = 1,017.12/x
  3. Step 3: Cross multiply
    1,991.76x = 2,986.20 × 1,017.12
  4. Step 4: Simplify right side
    1,991.76x = 3,037,323.74
  5. Step 5: Solve for x
    x = 3,037,323.74/1,991.76
  6. Step 6: Final answer
    x = 1,524.94

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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.