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Finding the Fourth Proportional to 783.44, 1,175.60 and 418.44

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Solution

The fourth proportional to 783.44, 1,175.60 and 418.44 is: 627.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.44 : 1,175.60 = 418.44 : x
  2. Step 2: Convert to fraction form
    783.44/1,175.60 = 418.44/x
  3. Step 3: Cross multiply
    783.44x = 1,175.60 × 418.44
  4. Step 4: Simplify right side
    783.44x = 491,918.06
  5. Step 5: Solve for x
    x = 491,918.06/783.44
  6. Step 6: Final answer
    x = 627.90

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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.