Home / 1,973.40-2,721.62-1,187.30

Finding the Fourth Proportional to 1,973.40, 2,721.62 and 1,187.30

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Solution

The fourth proportional to 1,973.40, 2,721.62 and 1,187.30 is: 1,637.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,973.40 : 2,721.62 = 1,187.30 : x
  2. Step 2: Convert to fraction form
    1,973.40/2,721.62 = 1,187.30/x
  3. Step 3: Cross multiply
    1,973.40x = 2,721.62 × 1,187.30
  4. Step 4: Simplify right side
    1,973.40x = 3,231,379.43
  5. Step 5: Solve for x
    x = 3,231,379.43/1,973.40
  6. Step 6: Final answer
    x = 1,637.47

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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.