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Finding the Fourth Proportional to 357.80, 537.20 and 228.60

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Solution

The fourth proportional to 357.80, 537.20 and 228.60 is: 343.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.80 : 537.20 = 228.60 : x
  2. Step 2: Convert to fraction form
    357.80/537.20 = 228.60/x
  3. Step 3: Cross multiply
    357.80x = 537.20 × 228.60
  4. Step 4: Simplify right side
    357.80x = 122,803.92
  5. Step 5: Solve for x
    x = 122,803.92/357.80
  6. Step 6: Final answer
    x = 343.22

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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.