Home / 3,939.64-5,899.72-2,897.20

Finding the Fourth Proportional to 3,939.64, 5,899.72 and 2,897.20

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Solution

The fourth proportional to 3,939.64, 5,899.72 and 2,897.20 is: 4,338.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.64 : 5,899.72 = 2,897.20 : x
  2. Step 2: Convert to fraction form
    3,939.64/5,899.72 = 2,897.20/x
  3. Step 3: Cross multiply
    3,939.64x = 5,899.72 × 2,897.20
  4. Step 4: Simplify right side
    3,939.64x = 17,092,668.78
  5. Step 5: Solve for x
    x = 17,092,668.78/3,939.64
  6. Step 6: Final answer
    x = 4,338.64

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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.