Home / 2,157.10-2,977.19-1,272.85

Finding the Fourth Proportional to 2,157.10, 2,977.19 and 1,272.85

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Solution

The fourth proportional to 2,157.10, 2,977.19 and 1,272.85 is: 1,756.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.10 : 2,977.19 = 1,272.85 : x
  2. Step 2: Convert to fraction form
    2,157.10/2,977.19 = 1,272.85/x
  3. Step 3: Cross multiply
    2,157.10x = 2,977.19 × 1,272.85
  4. Step 4: Simplify right side
    2,157.10x = 3,789,516.29
  5. Step 5: Solve for x
    x = 3,789,516.29/2,157.10
  6. Step 6: Final answer
    x = 1,756.76

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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.