Home / 2,117.16-2,921.74-1,331.22

Finding the Fourth Proportional to 2,117.16, 2,921.74 and 1,331.22

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Solution

The fourth proportional to 2,117.16, 2,921.74 and 1,331.22 is: 1,837.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.16 : 2,921.74 = 1,331.22 : x
  2. Step 2: Convert to fraction form
    2,117.16/2,921.74 = 1,331.22/x
  3. Step 3: Cross multiply
    2,117.16x = 2,921.74 × 1,331.22
  4. Step 4: Simplify right side
    2,117.16x = 3,889,478.72
  5. Step 5: Solve for x
    x = 3,889,478.72/2,117.16
  6. Step 6: Final answer
    x = 1,837.12

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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.