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Finding the Fourth Proportional to 1,333.21, 1,839.40 and 743.63

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Solution

The fourth proportional to 1,333.21, 1,839.40 and 743.63 is: 1,025.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.21 : 1,839.40 = 743.63 : x
  2. Step 2: Convert to fraction form
    1,333.21/1,839.40 = 743.63/x
  3. Step 3: Cross multiply
    1,333.21x = 1,839.40 × 743.63
  4. Step 4: Simplify right side
    1,333.21x = 1,367,841.67
  5. Step 5: Solve for x
    x = 1,367,841.67/1,333.21
  6. Step 6: Final answer
    x = 1,025.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.