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Finding the Fourth Proportional to 1,131.79, 1,697.67 and 744.23

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Solution

The fourth proportional to 1,131.79, 1,697.67 and 744.23 is: 1,116.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.79 : 1,697.67 = 744.23 : x
  2. Step 2: Convert to fraction form
    1,131.79/1,697.67 = 744.23/x
  3. Step 3: Cross multiply
    1,131.79x = 1,697.67 × 744.23
  4. Step 4: Simplify right side
    1,131.79x = 1,263,456.94
  5. Step 5: Solve for x
    x = 1,263,456.94/1,131.79
  6. Step 6: Final answer
    x = 1,116.34

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1.5x scale

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.