Home / 3,149.29-4,723.39-840.25

Finding the Fourth Proportional to 3,149.29, 4,723.39 and 840.25

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Solution

The fourth proportional to 3,149.29, 4,723.39 and 840.25 is: 1,260.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,149.29 : 4,723.39 = 840.25 : x
  2. Step 2: Convert to fraction form
    3,149.29/4,723.39 = 840.25/x
  3. Step 3: Cross multiply
    3,149.29x = 4,723.39 × 840.25
  4. Step 4: Simplify right side
    3,149.29x = 3,968,828.45
  5. Step 5: Solve for x
    x = 3,968,828.45/3,149.29
  6. Step 6: Final answer
    x = 1,260.23

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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.