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Finding the Fourth Proportional to 388.73, 536.36 and 222.99

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Solution

The fourth proportional to 388.73, 536.36 and 222.99 is: 307.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.73 : 536.36 = 222.99 : x
  2. Step 2: Convert to fraction form
    388.73/536.36 = 222.99/x
  3. Step 3: Cross multiply
    388.73x = 536.36 × 222.99
  4. Step 4: Simplify right side
    388.73x = 119,599.79
  5. Step 5: Solve for x
    x = 119,599.79/388.73
  6. Step 6: Final answer
    x = 307.67

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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.