Home / 1,991.16-2,986.77-604.56

Finding the Fourth Proportional to 1,991.16, 2,986.77 and 604.56

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Solution

The fourth proportional to 1,991.16, 2,986.77 and 604.56 is: 906.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.16 : 2,986.77 = 604.56 : x
  2. Step 2: Convert to fraction form
    1,991.16/2,986.77 = 604.56/x
  3. Step 3: Cross multiply
    1,991.16x = 2,986.77 × 604.56
  4. Step 4: Simplify right side
    1,991.16x = 1,805,681.67
  5. Step 5: Solve for x
    x = 1,805,681.67/1,991.16
  6. Step 6: Final answer
    x = 906.85

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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.