Home / 2,991.31-4,130.04-1,872.70

Finding the Fourth Proportional to 2,991.31, 4,130.04 and 1,872.70

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Solution

The fourth proportional to 2,991.31, 4,130.04 and 1,872.70 is: 2,585.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.31 : 4,130.04 = 1,872.70 : x
  2. Step 2: Convert to fraction form
    2,991.31/4,130.04 = 1,872.70/x
  3. Step 3: Cross multiply
    2,991.31x = 4,130.04 × 1,872.70
  4. Step 4: Simplify right side
    2,991.31x = 7,734,325.91
  5. Step 5: Solve for x
    x = 7,734,325.91/2,991.31
  6. Step 6: Final answer
    x = 2,585.60

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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.