Home / 2,405.16-3,318.84-1,357.20

Finding the Fourth Proportional to 2,405.16, 3,318.84 and 1,357.20

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Solution

The fourth proportional to 2,405.16, 3,318.84 and 1,357.20 is: 1,872.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,405.16 : 3,318.84 = 1,357.20 : x
  2. Step 2: Convert to fraction form
    2,405.16/3,318.84 = 1,357.20/x
  3. Step 3: Cross multiply
    2,405.16x = 3,318.84 × 1,357.20
  4. Step 4: Simplify right side
    2,405.16x = 4,504,329.65
  5. Step 5: Solve for x
    x = 4,504,329.65/2,405.16
  6. Step 6: Final answer
    x = 1,872.78

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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.