Home / 2,118.12-3,177.18-579.12

Finding the Fourth Proportional to 2,118.12, 3,177.18 and 579.12

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Solution

The fourth proportional to 2,118.12, 3,177.18 and 579.12 is: 868.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.12 : 3,177.18 = 579.12 : x
  2. Step 2: Convert to fraction form
    2,118.12/3,177.18 = 579.12/x
  3. Step 3: Cross multiply
    2,118.12x = 3,177.18 × 579.12
  4. Step 4: Simplify right side
    2,118.12x = 1,839,968.48
  5. Step 5: Solve for x
    x = 1,839,968.48/2,118.12
  6. Step 6: Final answer
    x = 868.68

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Double scale
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Similar ratio
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1.5x scale

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.