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Finding the Fourth Proportional to 2,756.96, 4,135.95 and 908.15

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Solution

The fourth proportional to 2,756.96, 4,135.95 and 908.15 is: 1,362.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756.96 : 4,135.95 = 908.15 : x
  2. Step 2: Convert to fraction form
    2,756.96/4,135.95 = 908.15/x
  3. Step 3: Cross multiply
    2,756.96x = 4,135.95 × 908.15
  4. Step 4: Simplify right side
    2,756.96x = 3,756,062.99
  5. Step 5: Solve for x
    x = 3,756,062.99/2,756.96
  6. Step 6: Final answer
    x = 1,362.39

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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.