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Finding the Fourth Proportional to 855.03, 1,181.49 and 738.39

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Solution

The fourth proportional to 855.03, 1,181.49 and 738.39 is: 1,020.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.03 : 1,181.49 = 738.39 : x
  2. Step 2: Convert to fraction form
    855.03/1,181.49 = 738.39/x
  3. Step 3: Cross multiply
    855.03x = 1,181.49 × 738.39
  4. Step 4: Simplify right side
    855.03x = 872,400.40
  5. Step 5: Solve for x
    x = 872,400.40/855.03
  6. Step 6: Final answer
    x = 1,020.32

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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.