Home / 3,086.40-4,629.56-777.90

Finding the Fourth Proportional to 3,086.40, 4,629.56 and 777.90

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Solution

The fourth proportional to 3,086.40, 4,629.56 and 777.90 is: 1,166.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.40 : 4,629.56 = 777.90 : x
  2. Step 2: Convert to fraction form
    3,086.40/4,629.56 = 777.90/x
  3. Step 3: Cross multiply
    3,086.40x = 4,629.56 × 777.90
  4. Step 4: Simplify right side
    3,086.40x = 3,601,334.72
  5. Step 5: Solve for x
    x = 3,601,334.72/3,086.40
  6. Step 6: Final answer
    x = 1,166.84

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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.