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Finding the Fourth Proportional to 3,454.53, 5,181.66 and 857.40

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Solution

The fourth proportional to 3,454.53, 5,181.66 and 857.40 is: 1,286.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,454.53 : 5,181.66 = 857.40 : x
  2. Step 2: Convert to fraction form
    3,454.53/5,181.66 = 857.40/x
  3. Step 3: Cross multiply
    3,454.53x = 5,181.66 × 857.40
  4. Step 4: Simplify right side
    3,454.53x = 4,442,755.28
  5. Step 5: Solve for x
    x = 4,442,755.28/3,454.53
  6. Step 6: Final answer
    x = 1,286.07

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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.