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Finding the Fourth Proportional to 3,145.68, 4,718.79 and 1,197.90

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Solution

The fourth proportional to 3,145.68, 4,718.79 and 1,197.90 is: 1,796.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.68 : 4,718.79 = 1,197.90 : x
  2. Step 2: Convert to fraction form
    3,145.68/4,718.79 = 1,197.90/x
  3. Step 3: Cross multiply
    3,145.68x = 4,718.79 × 1,197.90
  4. Step 4: Simplify right side
    3,145.68x = 5,652,638.54
  5. Step 5: Solve for x
    x = 5,652,638.54/3,145.68
  6. Step 6: Final answer
    x = 1,796.95

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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.