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Finding the Fourth Proportional to 355.95, 533.93 and 121.67

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Solution

The fourth proportional to 355.95, 533.93 and 121.67 is: 182.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.95 : 533.93 = 121.67 : x
  2. Step 2: Convert to fraction form
    355.95/533.93 = 121.67/x
  3. Step 3: Cross multiply
    355.95x = 533.93 × 121.67
  4. Step 4: Simplify right side
    355.95x = 64,964.90
  5. Step 5: Solve for x
    x = 64,964.90/355.95
  6. Step 6: Final answer
    x = 182.51

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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.