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Finding the Fourth Proportional to 3,168.75, 4,753.80 and 977.70

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Solution

The fourth proportional to 3,168.75, 4,753.80 and 977.70 is: 1,466.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.75 : 4,753.80 = 977.70 : x
  2. Step 2: Convert to fraction form
    3,168.75/4,753.80 = 977.70/x
  3. Step 3: Cross multiply
    3,168.75x = 4,753.80 × 977.70
  4. Step 4: Simplify right side
    3,168.75x = 4,647,790.26
  5. Step 5: Solve for x
    x = 4,647,790.26/3,168.75
  6. Step 6: Final answer
    x = 1,466.76

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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.