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Finding the Fourth Proportional to 558.54, 837.75 and 438.25

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Solution

The fourth proportional to 558.54, 837.75 and 438.25 is: 657.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.54 : 837.75 = 438.25 : x
  2. Step 2: Convert to fraction form
    558.54/837.75 = 438.25/x
  3. Step 3: Cross multiply
    558.54x = 837.75 × 438.25
  4. Step 4: Simplify right side
    558.54x = 367,143.94
  5. Step 5: Solve for x
    x = 367,143.94/558.54
  6. Step 6: Final answer
    x = 657.33

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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.