Home / 1,728.59-2,380.46-1,638.36

Finding the Fourth Proportional to 1,728.59, 2,380.46 and 1,638.36

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Solution

The fourth proportional to 1,728.59, 2,380.46 and 1,638.36 is: 2,256.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.59 : 2,380.46 = 1,638.36 : x
  2. Step 2: Convert to fraction form
    1,728.59/2,380.46 = 1,638.36/x
  3. Step 3: Cross multiply
    1,728.59x = 2,380.46 × 1,638.36
  4. Step 4: Simplify right side
    1,728.59x = 3,900,042.25
  5. Step 5: Solve for x
    x = 3,900,042.25/1,728.59
  6. Step 6: Final answer
    x = 2,256.21

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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.