Home / 1,725.20-2,379.90-1,128.04

Finding the Fourth Proportional to 1,725.20, 2,379.90 and 1,128.04

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Solution

The fourth proportional to 1,725.20, 2,379.90 and 1,128.04 is: 1,556.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.20 : 2,379.90 = 1,128.04 : x
  2. Step 2: Convert to fraction form
    1,725.20/2,379.90 = 1,128.04/x
  3. Step 3: Cross multiply
    1,725.20x = 2,379.90 × 1,128.04
  4. Step 4: Simplify right side
    1,725.20x = 2,684,622.40
  5. Step 5: Solve for x
    x = 2,684,622.40/1,725.20
  6. Step 6: Final answer
    x = 1,556.12

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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.