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Finding the Fourth Proportional to 1,493.97, 2,240.94 and 398.40

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Solution

The fourth proportional to 1,493.97, 2,240.94 and 398.40 is: 597.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,493.97 : 2,240.94 = 398.40 : x
  2. Step 2: Convert to fraction form
    1,493.97/2,240.94 = 398.40/x
  3. Step 3: Cross multiply
    1,493.97x = 2,240.94 × 398.40
  4. Step 4: Simplify right side
    1,493.97x = 892,790.50
  5. Step 5: Solve for x
    x = 892,790.50/1,493.97
  6. Step 6: Final answer
    x = 597.60

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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.