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Finding the Fourth Proportional to 950.39, 1,311.19 and 591.45

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Solution

The fourth proportional to 950.39, 1,311.19 and 591.45 is: 815.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.39 : 1,311.19 = 591.45 : x
  2. Step 2: Convert to fraction form
    950.39/1,311.19 = 591.45/x
  3. Step 3: Cross multiply
    950.39x = 1,311.19 × 591.45
  4. Step 4: Simplify right side
    950.39x = 775,503.33
  5. Step 5: Solve for x
    x = 775,503.33/950.39
  6. Step 6: Final answer
    x = 815.98

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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.