Home / 2,159.24-3,240.72-861.64

Finding the Fourth Proportional to 2,159.24, 3,240.72 and 861.64

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Solution

The fourth proportional to 2,159.24, 3,240.72 and 861.64 is: 1,293.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.24 : 3,240.72 = 861.64 : x
  2. Step 2: Convert to fraction form
    2,159.24/3,240.72 = 861.64/x
  3. Step 3: Cross multiply
    2,159.24x = 3,240.72 × 861.64
  4. Step 4: Simplify right side
    2,159.24x = 2,792,333.98
  5. Step 5: Solve for x
    x = 2,792,333.98/2,159.24
  6. Step 6: Final answer
    x = 1,293.20

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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.