Home / 1,231.20-1,846.50-409.23

Finding the Fourth Proportional to 1,231.20, 1,846.50 and 409.23

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Solution

The fourth proportional to 1,231.20, 1,846.50 and 409.23 is: 613.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.20 : 1,846.50 = 409.23 : x
  2. Step 2: Convert to fraction form
    1,231.20/1,846.50 = 409.23/x
  3. Step 3: Cross multiply
    1,231.20x = 1,846.50 × 409.23
  4. Step 4: Simplify right side
    1,231.20x = 755,643.20
  5. Step 5: Solve for x
    x = 755,643.20/1,231.20
  6. Step 6: Final answer
    x = 613.75

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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.