Home / 2,145.36-3,211.92-1,412.70

Finding the Fourth Proportional to 2,145.36, 3,211.92 and 1,412.70

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Solution

The fourth proportional to 2,145.36, 3,211.92 and 1,412.70 is: 2,115.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.36 : 3,211.92 = 1,412.70 : x
  2. Step 2: Convert to fraction form
    2,145.36/3,211.92 = 1,412.70/x
  3. Step 3: Cross multiply
    2,145.36x = 3,211.92 × 1,412.70
  4. Step 4: Simplify right side
    2,145.36x = 4,537,479.38
  5. Step 5: Solve for x
    x = 4,537,479.38/2,145.36
  6. Step 6: Final answer
    x = 2,115.02

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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.