Home / 3,898.19-5,379.80-2,405.32

Finding the Fourth Proportional to 3,898.19, 5,379.80 and 2,405.32

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Solution

The fourth proportional to 3,898.19, 5,379.80 and 2,405.32 is: 3,319.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.19 : 5,379.80 = 2,405.32 : x
  2. Step 2: Convert to fraction form
    3,898.19/5,379.80 = 2,405.32/x
  3. Step 3: Cross multiply
    3,898.19x = 5,379.80 × 2,405.32
  4. Step 4: Simplify right side
    3,898.19x = 12,940,115.06
  5. Step 5: Solve for x
    x = 12,940,115.06/3,898.19
  6. Step 6: Final answer
    x = 3,319.52

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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.