Home / 1,725.50-2,381.20-939.60

Finding the Fourth Proportional to 1,725.50, 2,381.20 and 939.60

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Solution

The fourth proportional to 1,725.50, 2,381.20 and 939.60 is: 1,296.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.50 : 2,381.20 = 939.60 : x
  2. Step 2: Convert to fraction form
    1,725.50/2,381.20 = 939.60/x
  3. Step 3: Cross multiply
    1,725.50x = 2,381.20 × 939.60
  4. Step 4: Simplify right side
    1,725.50x = 2,237,373.17
  5. Step 5: Solve for x
    x = 2,237,373.17/1,725.50
  6. Step 6: Final answer
    x = 1,296.65

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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.