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Finding the Fourth Proportional to 2,529.49, 3,794.79 and 774.64

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Solution

The fourth proportional to 2,529.49, 3,794.79 and 774.64 is: 1,162.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,529.49 : 3,794.79 = 774.64 : x
  2. Step 2: Convert to fraction form
    2,529.49/3,794.79 = 774.64/x
  3. Step 3: Cross multiply
    2,529.49x = 3,794.79 × 774.64
  4. Step 4: Simplify right side
    2,529.49x = 2,939,596.13
  5. Step 5: Solve for x
    x = 2,939,596.13/2,529.49
  6. Step 6: Final answer
    x = 1,162.13

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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.