Home / 2,118.12-2,922.88-1,186.60

Finding the Fourth Proportional to 2,118.12, 2,922.88 and 1,186.60

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Solution

The fourth proportional to 2,118.12, 2,922.88 and 1,186.60 is: 1,637.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.12 : 2,922.88 = 1,186.60 : x
  2. Step 2: Convert to fraction form
    2,118.12/2,922.88 = 1,186.60/x
  3. Step 3: Cross multiply
    2,118.12x = 2,922.88 × 1,186.60
  4. Step 4: Simplify right side
    2,118.12x = 3,468,289.41
  5. Step 5: Solve for x
    x = 3,468,289.41/2,118.12
  6. Step 6: Final answer
    x = 1,637.44

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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.