Home / 2,005.20-2,766.74-1,218.80

Finding the Fourth Proportional to 2,005.20, 2,766.74 and 1,218.80

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Solution

The fourth proportional to 2,005.20, 2,766.74 and 1,218.80 is: 1,681.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.20 : 2,766.74 = 1,218.80 : x
  2. Step 2: Convert to fraction form
    2,005.20/2,766.74 = 1,218.80/x
  3. Step 3: Cross multiply
    2,005.20x = 2,766.74 × 1,218.80
  4. Step 4: Simplify right side
    2,005.20x = 3,372,102.71
  5. Step 5: Solve for x
    x = 3,372,102.71/2,005.20
  6. Step 6: Final answer
    x = 1,681.68

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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.