Home / 2,174.75-3,001.20-1,290.23

Finding the Fourth Proportional to 2,174.75, 3,001.20 and 1,290.23

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Solution

The fourth proportional to 2,174.75, 3,001.20 and 1,290.23 is: 1,780.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.75 : 3,001.20 = 1,290.23 : x
  2. Step 2: Convert to fraction form
    2,174.75/3,001.20 = 1,290.23/x
  3. Step 3: Cross multiply
    2,174.75x = 3,001.20 × 1,290.23
  4. Step 4: Simplify right side
    2,174.75x = 3,872,238.28
  5. Step 5: Solve for x
    x = 3,872,238.28/2,174.75
  6. Step 6: Final answer
    x = 1,780.54

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Half scale
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Double 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.