Home / 2,104.56-2,904.78-1,220.88

Finding the Fourth Proportional to 2,104.56, 2,904.78 and 1,220.88

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Solution

The fourth proportional to 2,104.56, 2,904.78 and 1,220.88 is: 1,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.56 : 2,904.78 = 1,220.88 : x
  2. Step 2: Convert to fraction form
    2,104.56/2,904.78 = 1,220.88/x
  3. Step 3: Cross multiply
    2,104.56x = 2,904.78 × 1,220.88
  4. Step 4: Simplify right side
    2,104.56x = 3,546,387.81
  5. Step 5: Solve for x
    x = 3,546,387.81/2,104.56
  6. Step 6: Final answer
    x = 1,685.10

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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.