Home / 3,840.62-5,300.78-2,405.65

Finding the Fourth Proportional to 3,840.62, 5,300.78 and 2,405.65

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Solution

The fourth proportional to 3,840.62, 5,300.78 and 2,405.65 is: 3,320.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840.62 : 5,300.78 = 2,405.65 : x
  2. Step 2: Convert to fraction form
    3,840.62/5,300.78 = 2,405.65/x
  3. Step 3: Cross multiply
    3,840.62x = 5,300.78 × 2,405.65
  4. Step 4: Simplify right side
    3,840.62x = 12,751,821.41
  5. Step 5: Solve for x
    x = 12,751,821.41/3,840.62
  6. Step 6: Final answer
    x = 3,320.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.