Home / 3,318.36-4,578.71-1,991.58

Finding the Fourth Proportional to 3,318.36, 4,578.71 and 1,991.58

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Solution

The fourth proportional to 3,318.36, 4,578.71 and 1,991.58 is: 2,748.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.36 : 4,578.71 = 1,991.58 : x
  2. Step 2: Convert to fraction form
    3,318.36/4,578.71 = 1,991.58/x
  3. Step 3: Cross multiply
    3,318.36x = 4,578.71 × 1,991.58
  4. Step 4: Simplify right side
    3,318.36x = 9,118,857.30
  5. Step 5: Solve for x
    x = 9,118,857.30/3,318.36
  6. Step 6: Final answer
    x = 2,748.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.