Home / 2,116.62-2,921.13-1,407.22

Finding the Fourth Proportional to 2,116.62, 2,921.13 and 1,407.22

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Solution

The fourth proportional to 2,116.62, 2,921.13 and 1,407.22 is: 1,942.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.62 : 2,921.13 = 1,407.22 : x
  2. Step 2: Convert to fraction form
    2,116.62/2,921.13 = 1,407.22/x
  3. Step 3: Cross multiply
    2,116.62x = 2,921.13 × 1,407.22
  4. Step 4: Simplify right side
    2,116.62x = 4,110,665.26
  5. Step 5: Solve for x
    x = 4,110,665.26/2,116.62
  6. Step 6: Final answer
    x = 1,942.09

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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.