Home / 2,156.56-2,976.24-1,272.64

Finding the Fourth Proportional to 2,156.56, 2,976.24 and 1,272.64

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Solution

The fourth proportional to 2,156.56, 2,976.24 and 1,272.64 is: 1,756.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.56 : 2,976.24 = 1,272.64 : x
  2. Step 2: Convert to fraction form
    2,156.56/2,976.24 = 1,272.64/x
  3. Step 3: Cross multiply
    2,156.56x = 2,976.24 × 1,272.64
  4. Step 4: Simplify right side
    2,156.56x = 3,787,682.07
  5. Step 5: Solve for x
    x = 3,787,682.07/2,156.56
  6. Step 6: Final answer
    x = 1,756.35

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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.