Home / 1,392.20-1,922.64-1,145.96

Finding the Fourth Proportional to 1,392.20, 1,922.64 and 1,145.96

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Solution

The fourth proportional to 1,392.20, 1,922.64 and 1,145.96 is: 1,582.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.20 : 1,922.64 = 1,145.96 : x
  2. Step 2: Convert to fraction form
    1,392.20/1,922.64 = 1,145.96/x
  3. Step 3: Cross multiply
    1,392.20x = 1,922.64 × 1,145.96
  4. Step 4: Simplify right side
    1,392.20x = 2,203,268.53
  5. Step 5: Solve for x
    x = 2,203,268.53/1,392.20
  6. Step 6: Final answer
    x = 1,582.58

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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.