Home / 2,880.90-3,974.67-1,761.21

Finding the Fourth Proportional to 2,880.90, 3,974.67 and 1,761.21

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Solution

The fourth proportional to 2,880.90, 3,974.67 and 1,761.21 is: 2,429.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.90 : 3,974.67 = 1,761.21 : x
  2. Step 2: Convert to fraction form
    2,880.90/3,974.67 = 1,761.21/x
  3. Step 3: Cross multiply
    2,880.90x = 3,974.67 × 1,761.21
  4. Step 4: Simplify right side
    2,880.90x = 7,000,228.55
  5. Step 5: Solve for x
    x = 7,000,228.55/2,880.90
  6. Step 6: Final answer
    x = 2,429.88

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1.5x scale

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.