Home / 1,971.93-2,720.45-1,382.86

Finding the Fourth Proportional to 1,971.93, 2,720.45 and 1,382.86

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Solution

The fourth proportional to 1,971.93, 2,720.45 and 1,382.86 is: 1,907.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.93 : 2,720.45 = 1,382.86 : x
  2. Step 2: Convert to fraction form
    1,971.93/2,720.45 = 1,382.86/x
  3. Step 3: Cross multiply
    1,971.93x = 2,720.45 × 1,382.86
  4. Step 4: Simplify right side
    1,971.93x = 3,762,001.49
  5. Step 5: Solve for x
    x = 3,762,001.49/1,971.93
  6. Step 6: Final answer
    x = 1,907.78

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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.