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Finding the Fourth Proportional to 1,263.94, 1,744.40 and 739.97

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Solution

The fourth proportional to 1,263.94, 1,744.40 and 739.97 is: 1,021.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.94 : 1,744.40 = 739.97 : x
  2. Step 2: Convert to fraction form
    1,263.94/1,744.40 = 739.97/x
  3. Step 3: Cross multiply
    1,263.94x = 1,744.40 × 739.97
  4. Step 4: Simplify right side
    1,263.94x = 1,290,803.34
  5. Step 5: Solve for x
    x = 1,290,803.34/1,263.94
  6. Step 6: Final answer
    x = 1,021.26

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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.