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Finding the Fourth Proportional to 1,236.83, 1,855.43 and 403.63

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Solution

The fourth proportional to 1,236.83, 1,855.43 and 403.63 is: 605.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.83 : 1,855.43 = 403.63 : x
  2. Step 2: Convert to fraction form
    1,236.83/1,855.43 = 403.63/x
  3. Step 3: Cross multiply
    1,236.83x = 1,855.43 × 403.63
  4. Step 4: Simplify right side
    1,236.83x = 748,907.21
  5. Step 5: Solve for x
    x = 748,907.21/1,236.83
  6. Step 6: Final answer
    x = 605.51

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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.