Home / 1,376.90-1,897.71-1,224.21

Finding the Fourth Proportional to 1,376.90, 1,897.71 and 1,224.21

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Solution

The fourth proportional to 1,376.90, 1,897.71 and 1,224.21 is: 1,687.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.90 : 1,897.71 = 1,224.21 : x
  2. Step 2: Convert to fraction form
    1,376.90/1,897.71 = 1,224.21/x
  3. Step 3: Cross multiply
    1,376.90x = 1,897.71 × 1,224.21
  4. Step 4: Simplify right side
    1,376.90x = 2,323,195.56
  5. Step 5: Solve for x
    x = 2,323,195.56/1,376.90
  6. Step 6: Final answer
    x = 1,687.27

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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.