Home / 1,904.32-2,855.40-1,286.56

Finding the Fourth Proportional to 1,904.32, 2,855.40 and 1,286.56

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Solution

The fourth proportional to 1,904.32, 2,855.40 and 1,286.56 is: 1,929.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.32 : 2,855.40 = 1,286.56 : x
  2. Step 2: Convert to fraction form
    1,904.32/2,855.40 = 1,286.56/x
  3. Step 3: Cross multiply
    1,904.32x = 2,855.40 × 1,286.56
  4. Step 4: Simplify right side
    1,904.32x = 3,673,643.42
  5. Step 5: Solve for x
    x = 3,673,643.42/1,904.32
  6. Step 6: Final answer
    x = 1,929.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.