Home / 2,160.86-2,980.92-1,375.16

Finding the Fourth Proportional to 2,160.86, 2,980.92 and 1,375.16

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Solution

The fourth proportional to 2,160.86, 2,980.92 and 1,375.16 is: 1,897.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.86 : 2,980.92 = 1,375.16 : x
  2. Step 2: Convert to fraction form
    2,160.86/2,980.92 = 1,375.16/x
  3. Step 3: Cross multiply
    2,160.86x = 2,980.92 × 1,375.16
  4. Step 4: Simplify right side
    2,160.86x = 4,099,241.95
  5. Step 5: Solve for x
    x = 4,099,241.95/2,160.86
  6. Step 6: Final answer
    x = 1,897.04

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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.