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Finding the Fourth Proportional to 578.45, 867.80 and 167.60

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Solution

The fourth proportional to 578.45, 867.80 and 167.60 is: 251.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.45 : 867.80 = 167.60 : x
  2. Step 2: Convert to fraction form
    578.45/867.80 = 167.60/x
  3. Step 3: Cross multiply
    578.45x = 867.80 × 167.60
  4. Step 4: Simplify right side
    578.45x = 145,441.36
  5. Step 5: Solve for x
    x = 145,441.36/578.45
  6. Step 6: Final answer
    x = 251.44

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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.