Home / 2,120.68-2,925.78-1,236.16

Finding the Fourth Proportional to 2,120.68, 2,925.78 and 1,236.16

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Solution

The fourth proportional to 2,120.68, 2,925.78 and 1,236.16 is: 1,705.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.68 : 2,925.78 = 1,236.16 : x
  2. Step 2: Convert to fraction form
    2,120.68/2,925.78 = 1,236.16/x
  3. Step 3: Cross multiply
    2,120.68x = 2,925.78 × 1,236.16
  4. Step 4: Simplify right side
    2,120.68x = 3,616,732.20
  5. Step 5: Solve for x
    x = 3,616,732.20/2,120.68
  6. Step 6: Final answer
    x = 1,705.46

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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.