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Finding the Fourth Proportional to 1,233.90, 1,851.18 and 617.43

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Solution

The fourth proportional to 1,233.90, 1,851.18 and 617.43 is: 926.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.90 : 1,851.18 = 617.43 : x
  2. Step 2: Convert to fraction form
    1,233.90/1,851.18 = 617.43/x
  3. Step 3: Cross multiply
    1,233.90x = 1,851.18 × 617.43
  4. Step 4: Simplify right side
    1,233.90x = 1,142,974.07
  5. Step 5: Solve for x
    x = 1,142,974.07/1,233.90
  6. Step 6: Final answer
    x = 926.31

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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.