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Finding the Fourth Proportional to 934.85, 1,396.38 and 908.93

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Solution

The fourth proportional to 934.85, 1,396.38 and 908.93 is: 1,357.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.85 : 1,396.38 = 908.93 : x
  2. Step 2: Convert to fraction form
    934.85/1,396.38 = 908.93/x
  3. Step 3: Cross multiply
    934.85x = 1,396.38 × 908.93
  4. Step 4: Simplify right side
    934.85x = 1,269,213.95
  5. Step 5: Solve for x
    x = 1,269,213.95/934.85
  6. Step 6: Final answer
    x = 1,357.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.