Home / 1,971.84-2,720.77-1,185.90

Finding the Fourth Proportional to 1,971.84, 2,720.77 and 1,185.90

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Solution

The fourth proportional to 1,971.84, 2,720.77 and 1,185.90 is: 1,636.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.84 : 2,720.77 = 1,185.90 : x
  2. Step 2: Convert to fraction form
    1,971.84/2,720.77 = 1,185.90/x
  3. Step 3: Cross multiply
    1,971.84x = 2,720.77 × 1,185.90
  4. Step 4: Simplify right side
    1,971.84x = 3,226,561.14
  5. Step 5: Solve for x
    x = 3,226,561.14/1,971.84
  6. Step 6: Final answer
    x = 1,636.32

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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.