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Finding the Fourth Proportional to 3,127.64, 4,691.64 and 936.60

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Solution

The fourth proportional to 3,127.64, 4,691.64 and 936.60 is: 1,404.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.64 : 4,691.64 = 936.60 : x
  2. Step 2: Convert to fraction form
    3,127.64/4,691.64 = 936.60/x
  3. Step 3: Cross multiply
    3,127.64x = 4,691.64 × 936.60
  4. Step 4: Simplify right side
    3,127.64x = 4,394,190.02
  5. Step 5: Solve for x
    x = 4,394,190.02/3,127.64
  6. Step 6: Final answer
    x = 1,404.95

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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.