Home / 2,405.82-3,318.39-2,159.58

Finding the Fourth Proportional to 2,405.82, 3,318.39 and 2,159.58

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Solution

The fourth proportional to 2,405.82, 3,318.39 and 2,159.58 is: 2,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,405.82 : 3,318.39 = 2,159.58 : x
  2. Step 2: Convert to fraction form
    2,405.82/3,318.39 = 2,159.58/x
  3. Step 3: Cross multiply
    2,405.82x = 3,318.39 × 2,159.58
  4. Step 4: Simplify right side
    2,405.82x = 7,166,328.68
  5. Step 5: Solve for x
    x = 7,166,328.68/2,405.82
  6. Step 6: Final answer
    x = 2,978.75

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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.