Home / 2,165.00-2,987.57-1,220.94

Finding the Fourth Proportional to 2,165.00, 2,987.57 and 1,220.94

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Solution

The fourth proportional to 2,165.00, 2,987.57 and 1,220.94 is: 1,684.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.00 : 2,987.57 = 1,220.94 : x
  2. Step 2: Convert to fraction form
    2,165.00/2,987.57 = 1,220.94/x
  3. Step 3: Cross multiply
    2,165.00x = 2,987.57 × 1,220.94
  4. Step 4: Simplify right side
    2,165.00x = 3,647,646.77
  5. Step 5: Solve for x
    x = 3,647,646.77/2,165.00
  6. Step 6: Final answer
    x = 1,684.83

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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.