Home / 3,078.12-4,617.44-857.10

Finding the Fourth Proportional to 3,078.12, 4,617.44 and 857.10

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Solution

The fourth proportional to 3,078.12, 4,617.44 and 857.10 is: 1,285.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.12 : 4,617.44 = 857.10 : x
  2. Step 2: Convert to fraction form
    3,078.12/4,617.44 = 857.10/x
  3. Step 3: Cross multiply
    3,078.12x = 4,617.44 × 857.10
  4. Step 4: Simplify right side
    3,078.12x = 3,957,607.82
  5. Step 5: Solve for x
    x = 3,957,607.82/3,078.12
  6. Step 6: Final answer
    x = 1,285.72

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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.