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Finding the Fourth Proportional to 558.78, 838.09 and 193.60

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Solution

The fourth proportional to 558.78, 838.09 and 193.60 is: 290.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.78 : 838.09 = 193.60 : x
  2. Step 2: Convert to fraction form
    558.78/838.09 = 193.60/x
  3. Step 3: Cross multiply
    558.78x = 838.09 × 193.60
  4. Step 4: Simplify right side
    558.78x = 162,254.22
  5. Step 5: Solve for x
    x = 162,254.22/558.78
  6. Step 6: Final answer
    x = 290.37

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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.