Home / 2,159.72-2,980.44-1,228.28

Finding the Fourth Proportional to 2,159.72, 2,980.44 and 1,228.28

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Solution

The fourth proportional to 2,159.72, 2,980.44 and 1,228.28 is: 1,695.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.72 : 2,980.44 = 1,228.28 : x
  2. Step 2: Convert to fraction form
    2,159.72/2,980.44 = 1,228.28/x
  3. Step 3: Cross multiply
    2,159.72x = 2,980.44 × 1,228.28
  4. Step 4: Simplify right side
    2,159.72x = 3,660,814.84
  5. Step 5: Solve for x
    x = 3,660,814.84/2,159.72
  6. Step 6: Final answer
    x = 1,695.04

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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.