Home / 2,685.16-3,705.78-1,638.28

Finding the Fourth Proportional to 2,685.16, 3,705.78 and 1,638.28

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Solution

The fourth proportional to 2,685.16, 3,705.78 and 1,638.28 is: 2,260.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.16 : 3,705.78 = 1,638.28 : x
  2. Step 2: Convert to fraction form
    2,685.16/3,705.78 = 1,638.28/x
  3. Step 3: Cross multiply
    2,685.16x = 3,705.78 × 1,638.28
  4. Step 4: Simplify right side
    2,685.16x = 6,071,105.26
  5. Step 5: Solve for x
    x = 6,071,105.26/2,685.16
  6. Step 6: Final answer
    x = 2,260.98

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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.