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Finding the Fourth Proportional to 2,757.21, 4,136.33 and 908.40

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Solution

The fourth proportional to 2,757.21, 4,136.33 and 908.40 is: 1,362.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,757.21 : 4,136.33 = 908.40 : x
  2. Step 2: Convert to fraction form
    2,757.21/4,136.33 = 908.40/x
  3. Step 3: Cross multiply
    2,757.21x = 4,136.33 × 908.40
  4. Step 4: Simplify right side
    2,757.21x = 3,757,437.63
  5. Step 5: Solve for x
    x = 3,757,437.63/2,757.21
  6. Step 6: Final answer
    x = 1,362.77

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1.5x scale

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.