Home / 2,120.70-2,926.71-1,224.75

Finding the Fourth Proportional to 2,120.70, 2,926.71 and 1,224.75

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Solution

The fourth proportional to 2,120.70, 2,926.71 and 1,224.75 is: 1,690.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.70 : 2,926.71 = 1,224.75 : x
  2. Step 2: Convert to fraction form
    2,120.70/2,926.71 = 1,224.75/x
  3. Step 3: Cross multiply
    2,120.70x = 2,926.71 × 1,224.75
  4. Step 4: Simplify right side
    2,120.70x = 3,584,488.07
  5. Step 5: Solve for x
    x = 3,584,488.07/2,120.70
  6. Step 6: Final answer
    x = 1,690.24

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Half scale
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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.