Home / 1,973.90-2,723.97-1,187.78

Finding the Fourth Proportional to 1,973.90, 2,723.97 and 1,187.78

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Solution

The fourth proportional to 1,973.90, 2,723.97 and 1,187.78 is: 1,639.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,973.90 : 2,723.97 = 1,187.78 : x
  2. Step 2: Convert to fraction form
    1,973.90/2,723.97 = 1,187.78/x
  3. Step 3: Cross multiply
    1,973.90x = 2,723.97 × 1,187.78
  4. Step 4: Simplify right side
    1,973.90x = 3,235,477.09
  5. Step 5: Solve for x
    x = 3,235,477.09/1,973.90
  6. Step 6: Final answer
    x = 1,639.13

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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.