Home / 2,117.29-2,922.04-1,221.19

Finding the Fourth Proportional to 2,117.29, 2,922.04 and 1,221.19

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Solution

The fourth proportional to 2,117.29, 2,922.04 and 1,221.19 is: 1,685.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.29 : 2,922.04 = 1,221.19 : x
  2. Step 2: Convert to fraction form
    2,117.29/2,922.04 = 1,221.19/x
  3. Step 3: Cross multiply
    2,117.29x = 2,922.04 × 1,221.19
  4. Step 4: Simplify right side
    2,117.29x = 3,568,359.21
  5. Step 5: Solve for x
    x = 3,568,359.21/2,117.29
  6. Step 6: Final answer
    x = 1,685.34

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Half scale
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Double scale
Find fourth proportional to 2,118.29, 2,923.42 and 1,222.19
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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.