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Finding the Fourth Proportional to 1,299.39, 1,944.72 and 750.75

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Solution

The fourth proportional to 1,299.39, 1,944.72 and 750.75 is: 1,123.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.39 : 1,944.72 = 750.75 : x
  2. Step 2: Convert to fraction form
    1,299.39/1,944.72 = 750.75/x
  3. Step 3: Cross multiply
    1,299.39x = 1,944.72 × 750.75
  4. Step 4: Simplify right side
    1,299.39x = 1,459,998.54
  5. Step 5: Solve for x
    x = 1,459,998.54/1,299.39
  6. Step 6: Final answer
    x = 1,123.60

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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.