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Finding the Fourth Proportional to 2,505.87, 3,758.94 and 774.63

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Solution

The fourth proportional to 2,505.87, 3,758.94 and 774.63 is: 1,161.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,505.87 : 3,758.94 = 774.63 : x
  2. Step 2: Convert to fraction form
    2,505.87/3,758.94 = 774.63/x
  3. Step 3: Cross multiply
    2,505.87x = 3,758.94 × 774.63
  4. Step 4: Simplify right side
    2,505.87x = 2,911,787.69
  5. Step 5: Solve for x
    x = 2,911,787.69/2,505.87
  6. Step 6: Final answer
    x = 1,161.99

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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.