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Finding the Fourth Proportional to 855.28, 1,177.23 and 730.54

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Solution

The fourth proportional to 855.28, 1,177.23 and 730.54 is: 1,005.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.28 : 1,177.23 = 730.54 : x
  2. Step 2: Convert to fraction form
    855.28/1,177.23 = 730.54/x
  3. Step 3: Cross multiply
    855.28x = 1,177.23 × 730.54
  4. Step 4: Simplify right side
    855.28x = 860,013.60
  5. Step 5: Solve for x
    x = 860,013.60/855.28
  6. Step 6: Final answer
    x = 1,005.53

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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.