Home / 3,454.19-5,181.26-857.13

Finding the Fourth Proportional to 3,454.19, 5,181.26 and 857.13

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Solution

The fourth proportional to 3,454.19, 5,181.26 and 857.13 is: 1,285.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,454.19 : 5,181.26 = 857.13 : x
  2. Step 2: Convert to fraction form
    3,454.19/5,181.26 = 857.13/x
  3. Step 3: Cross multiply
    3,454.19x = 5,181.26 × 857.13
  4. Step 4: Simplify right side
    3,454.19x = 4,440,983.19
  5. Step 5: Solve for x
    x = 4,440,983.19/3,454.19
  6. Step 6: Final answer
    x = 1,285.68

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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.