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Finding the Fourth Proportional to 1,231.55, 1,846.80 and 398.37

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Solution

The fourth proportional to 1,231.55, 1,846.80 and 398.37 is: 597.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.55 : 1,846.80 = 398.37 : x
  2. Step 2: Convert to fraction form
    1,231.55/1,846.80 = 398.37/x
  3. Step 3: Cross multiply
    1,231.55x = 1,846.80 × 398.37
  4. Step 4: Simplify right side
    1,231.55x = 735,706.25
  5. Step 5: Solve for x
    x = 735,706.25/1,231.55
  6. Step 6: Final answer
    x = 597.38

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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.