Home / 2,118.13-3,177.21-579.13

Finding the Fourth Proportional to 2,118.13, 3,177.21 and 579.13

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Solution

The fourth proportional to 2,118.13, 3,177.21 and 579.13 is: 868.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.13 : 3,177.21 = 579.13 : x
  2. Step 2: Convert to fraction form
    2,118.13/3,177.21 = 579.13/x
  3. Step 3: Cross multiply
    2,118.13x = 3,177.21 × 579.13
  4. Step 4: Simplify right side
    2,118.13x = 1,840,017.63
  5. Step 5: Solve for x
    x = 1,840,017.63/2,118.13
  6. Step 6: Final answer
    x = 868.70

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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.