Home / 1,728.78-2,594.25-1,259.39

Finding the Fourth Proportional to 1,728.78, 2,594.25 and 1,259.39

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Solution

The fourth proportional to 1,728.78, 2,594.25 and 1,259.39 is: 1,889.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.78 : 2,594.25 = 1,259.39 : x
  2. Step 2: Convert to fraction form
    1,728.78/2,594.25 = 1,259.39/x
  3. Step 3: Cross multiply
    1,728.78x = 2,594.25 × 1,259.39
  4. Step 4: Simplify right side
    1,728.78x = 3,267,159.54
  5. Step 5: Solve for x
    x = 3,267,159.54/1,728.78
  6. Step 6: Final answer
    x = 1,889.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.