Home / 2,157.24-2,977.31-1,318.42

Finding the Fourth Proportional to 2,157.24, 2,977.31 and 1,318.42

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Solution

The fourth proportional to 2,157.24, 2,977.31 and 1,318.42 is: 1,819.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.24 : 2,977.31 = 1,318.42 : x
  2. Step 2: Convert to fraction form
    2,157.24/2,977.31 = 1,318.42/x
  3. Step 3: Cross multiply
    2,157.24x = 2,977.31 × 1,318.42
  4. Step 4: Simplify right side
    2,157.24x = 3,925,345.05
  5. Step 5: Solve for x
    x = 3,925,345.05/2,157.24
  6. Step 6: Final answer
    x = 1,819.61

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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.