Home / 1,231.20-1,846.60-409.39

Finding the Fourth Proportional to 1,231.20, 1,846.60 and 409.39

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Solution

The fourth proportional to 1,231.20, 1,846.60 and 409.39 is: 614.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.20 : 1,846.60 = 409.39 : x
  2. Step 2: Convert to fraction form
    1,231.20/1,846.60 = 409.39/x
  3. Step 3: Cross multiply
    1,231.20x = 1,846.60 × 409.39
  4. Step 4: Simplify right side
    1,231.20x = 755,973.93
  5. Step 5: Solve for x
    x = 755,973.93/1,231.20
  6. Step 6: Final answer
    x = 614.01

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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.