Home / 1,553.49-2,138.36-1,356.66

Finding the Fourth Proportional to 1,553.49, 2,138.36 and 1,356.66

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Solution

The fourth proportional to 1,553.49, 2,138.36 and 1,356.66 is: 1,867.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.49 : 2,138.36 = 1,356.66 : x
  2. Step 2: Convert to fraction form
    1,553.49/2,138.36 = 1,356.66/x
  3. Step 3: Cross multiply
    1,553.49x = 2,138.36 × 1,356.66
  4. Step 4: Simplify right side
    1,553.49x = 2,901,020.69
  5. Step 5: Solve for x
    x = 2,901,020.69/1,553.49
  6. Step 6: Final answer
    x = 1,867.42

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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.