Home / 1,422.90-2,115.18-1,379.16

Finding the Fourth Proportional to 1,422.90, 2,115.18 and 1,379.16

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Solution

The fourth proportional to 1,422.90, 2,115.18 and 1,379.16 is: 2,050.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.90 : 2,115.18 = 1,379.16 : x
  2. Step 2: Convert to fraction form
    1,422.90/2,115.18 = 1,379.16/x
  3. Step 3: Cross multiply
    1,422.90x = 2,115.18 × 1,379.16
  4. Step 4: Simplify right side
    1,422.90x = 2,917,171.65
  5. Step 5: Solve for x
    x = 2,917,171.65/1,422.90
  6. Step 6: Final answer
    x = 2,050.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.