Home / 2,921.10-4,381.71-1,687.62

Finding the Fourth Proportional to 2,921.10, 4,381.71 and 1,687.62

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Solution

The fourth proportional to 2,921.10, 4,381.71 and 1,687.62 is: 2,531.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.10 : 4,381.71 = 1,687.62 : x
  2. Step 2: Convert to fraction form
    2,921.10/4,381.71 = 1,687.62/x
  3. Step 3: Cross multiply
    2,921.10x = 4,381.71 × 1,687.62
  4. Step 4: Simplify right side
    2,921.10x = 7,394,661.43
  5. Step 5: Solve for x
    x = 7,394,661.43/2,921.10
  6. Step 6: Final answer
    x = 2,531.46

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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.