Home / 3,117.28-4,301.82-1,720

Finding the Fourth Proportional to 3,117.28, 4,301.82 and 1,720

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Solution

The fourth proportional to 3,117.28, 4,301.82 and 1,720 is: 2,373.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.28 : 4,301.82 = 1,720 : x
  2. Step 2: Convert to fraction form
    3,117.28/4,301.82 = 1,720/x
  3. Step 3: Cross multiply
    3,117.28x = 4,301.82 × 1,720
  4. Step 4: Simplify right side
    3,117.28x = 7,399,130.40
  5. Step 5: Solve for x
    x = 7,399,130.40/3,117.28
  6. Step 6: Final answer
    x = 2,373.59

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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.