Home / 2,120.24-3,180.40-581.28

Finding the Fourth Proportional to 2,120.24, 3,180.40 and 581.28

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Solution

The fourth proportional to 2,120.24, 3,180.40 and 581.28 is: 871.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.24 : 3,180.40 = 581.28 : x
  2. Step 2: Convert to fraction form
    2,120.24/3,180.40 = 581.28/x
  3. Step 3: Cross multiply
    2,120.24x = 3,180.40 × 581.28
  4. Step 4: Simplify right side
    2,120.24x = 1,848,702.91
  5. Step 5: Solve for x
    x = 1,848,702.91/2,120.24
  6. Step 6: Final answer
    x = 871.93

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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.