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Finding the Fourth Proportional to 3,114.63, 4,671.99 and 774.63

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Solution

The fourth proportional to 3,114.63, 4,671.99 and 774.63 is: 1,161.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,114.63 : 4,671.99 = 774.63 : x
  2. Step 2: Convert to fraction form
    3,114.63/4,671.99 = 774.63/x
  3. Step 3: Cross multiply
    3,114.63x = 4,671.99 × 774.63
  4. Step 4: Simplify right side
    3,114.63x = 3,619,063.61
  5. Step 5: Solve for x
    x = 3,619,063.61/3,114.63
  6. Step 6: Final answer
    x = 1,161.96

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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.