Home / 1,725.15-2,380.74-939.18

Finding the Fourth Proportional to 1,725.15, 2,380.74 and 939.18

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Solution

The fourth proportional to 1,725.15, 2,380.74 and 939.18 is: 1,296.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.15 : 2,380.74 = 939.18 : x
  2. Step 2: Convert to fraction form
    1,725.15/2,380.74 = 939.18/x
  3. Step 3: Cross multiply
    1,725.15x = 2,380.74 × 939.18
  4. Step 4: Simplify right side
    1,725.15x = 2,235,943.39
  5. Step 5: Solve for x
    x = 2,235,943.39/1,725.15
  6. Step 6: Final answer
    x = 1,296.09

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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.