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Finding the Fourth Proportional to 855.64, 1,181.36 and 541.36

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Solution

The fourth proportional to 855.64, 1,181.36 and 541.36 is: 747.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.64 : 1,181.36 = 541.36 : x
  2. Step 2: Convert to fraction form
    855.64/1,181.36 = 541.36/x
  3. Step 3: Cross multiply
    855.64x = 1,181.36 × 541.36
  4. Step 4: Simplify right side
    855.64x = 639,541.05
  5. Step 5: Solve for x
    x = 639,541.05/855.64
  6. Step 6: Final answer
    x = 747.44

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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.