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Finding the Fourth Proportional to 1,227.47, 1,694.78 and 755.99

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Solution

The fourth proportional to 1,227.47, 1,694.78 and 755.99 is: 1,043.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.47 : 1,694.78 = 755.99 : x
  2. Step 2: Convert to fraction form
    1,227.47/1,694.78 = 755.99/x
  3. Step 3: Cross multiply
    1,227.47x = 1,694.78 × 755.99
  4. Step 4: Simplify right side
    1,227.47x = 1,281,224.48
  5. Step 5: Solve for x
    x = 1,281,224.48/1,227.47
  6. Step 6: Final answer
    x = 1,043.80

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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.