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Finding the Fourth Proportional to 855.37, 1,185.29 and 803.35

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Solution

The fourth proportional to 855.37, 1,185.29 and 803.35 is: 1,113.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.37 : 1,185.29 = 803.35 : x
  2. Step 2: Convert to fraction form
    855.37/1,185.29 = 803.35/x
  3. Step 3: Cross multiply
    855.37x = 1,185.29 × 803.35
  4. Step 4: Simplify right side
    855.37x = 952,195.74
  5. Step 5: Solve for x
    x = 952,195.74/855.37
  6. Step 6: Final answer
    x = 1,113.20

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.