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Finding the Fourth Proportional to 749.99, 1,126.61 and 613.37

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Solution

The fourth proportional to 749.99, 1,126.61 and 613.37 is: 921.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.99 : 1,126.61 = 613.37 : x
  2. Step 2: Convert to fraction form
    749.99/1,126.61 = 613.37/x
  3. Step 3: Cross multiply
    749.99x = 1,126.61 × 613.37
  4. Step 4: Simplify right side
    749.99x = 691,028.78
  5. Step 5: Solve for x
    x = 691,028.78/749.99
  6. Step 6: Final answer
    x = 921.38

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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.