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Finding the Fourth Proportional to 939.45, 1,406.97 and 799.08

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Solution

The fourth proportional to 939.45, 1,406.97 and 799.08 is: 1,196.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.45 : 1,406.97 = 799.08 : x
  2. Step 2: Convert to fraction form
    939.45/1,406.97 = 799.08/x
  3. Step 3: Cross multiply
    939.45x = 1,406.97 × 799.08
  4. Step 4: Simplify right side
    939.45x = 1,124,281.59
  5. Step 5: Solve for x
    x = 1,124,281.59/939.45
  6. Step 6: Final answer
    x = 1,196.74

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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.