Home / 2,172.38-2,997-1,331.64

Finding the Fourth Proportional to 2,172.38, 2,997 and 1,331.64

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Solution

The fourth proportional to 2,172.38, 2,997 and 1,331.64 is: 1,837.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.38 : 2,997 = 1,331.64 : x
  2. Step 2: Convert to fraction form
    2,172.38/2,997 = 1,331.64/x
  3. Step 3: Cross multiply
    2,172.38x = 2,997 × 1,331.64
  4. Step 4: Simplify right side
    2,172.38x = 3,990,925.08
  5. Step 5: Solve for x
    x = 3,990,925.08/2,172.38
  6. Step 6: Final answer
    x = 1,837.13

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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.