Home / 1,415.27-2,121.46-490.19

Finding the Fourth Proportional to 1,415.27, 2,121.46 and 490.19

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Solution

The fourth proportional to 1,415.27, 2,121.46 and 490.19 is: 734.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.27 : 2,121.46 = 490.19 : x
  2. Step 2: Convert to fraction form
    1,415.27/2,121.46 = 490.19/x
  3. Step 3: Cross multiply
    1,415.27x = 2,121.46 × 490.19
  4. Step 4: Simplify right side
    1,415.27x = 1,039,906.64
  5. Step 5: Solve for x
    x = 1,039,906.64/1,415.27
  6. Step 6: Final answer
    x = 734.77

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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.