Home / 1,725.60-2,381.40-939.72

Finding the Fourth Proportional to 1,725.60, 2,381.40 and 939.72

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Solution

The fourth proportional to 1,725.60, 2,381.40 and 939.72 is: 1,296.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.60 : 2,381.40 = 939.72 : x
  2. Step 2: Convert to fraction form
    1,725.60/2,381.40 = 939.72/x
  3. Step 3: Cross multiply
    1,725.60x = 2,381.40 × 939.72
  4. Step 4: Simplify right side
    1,725.60x = 2,237,849.21
  5. Step 5: Solve for x
    x = 2,237,849.21/1,725.60
  6. Step 6: Final answer
    x = 1,296.85

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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.