Home / 2,159.62-2,980.36-1,228.12

Finding the Fourth Proportional to 2,159.62, 2,980.36 and 1,228.12

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Solution

The fourth proportional to 2,159.62, 2,980.36 and 1,228.12 is: 1,694.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.62 : 2,980.36 = 1,228.12 : x
  2. Step 2: Convert to fraction form
    2,159.62/2,980.36 = 1,228.12/x
  3. Step 3: Cross multiply
    2,159.62x = 2,980.36 × 1,228.12
  4. Step 4: Simplify right side
    2,159.62x = 3,660,239.72
  5. Step 5: Solve for x
    x = 3,660,239.72/2,159.62
  6. Step 6: Final answer
    x = 1,694.85

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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.