Home / 2,921.64-4,031.22-1,977.58

Finding the Fourth Proportional to 2,921.64, 4,031.22 and 1,977.58

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Solution

The fourth proportional to 2,921.64, 4,031.22 and 1,977.58 is: 2,728.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.64 : 4,031.22 = 1,977.58 : x
  2. Step 2: Convert to fraction form
    2,921.64/4,031.22 = 1,977.58/x
  3. Step 3: Cross multiply
    2,921.64x = 4,031.22 × 1,977.58
  4. Step 4: Simplify right side
    2,921.64x = 7,972,060.05
  5. Step 5: Solve for x
    x = 7,972,060.05/2,921.64
  6. Step 6: Final answer
    x = 2,728.63

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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.