Home / 1,664.36-2,491.42-1,387.88

Finding the Fourth Proportional to 1,664.36, 2,491.42 and 1,387.88

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Solution

The fourth proportional to 1,664.36, 2,491.42 and 1,387.88 is: 2,077.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.36 : 2,491.42 = 1,387.88 : x
  2. Step 2: Convert to fraction form
    1,664.36/2,491.42 = 1,387.88/x
  3. Step 3: Cross multiply
    1,664.36x = 2,491.42 × 1,387.88
  4. Step 4: Simplify right side
    1,664.36x = 3,457,791.99
  5. Step 5: Solve for x
    x = 3,457,791.99/1,664.36
  6. Step 6: Final answer
    x = 2,077.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.