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Finding the Fourth Proportional to 355.89, 533.69 and 274.79

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Solution

The fourth proportional to 355.89, 533.69 and 274.79 is: 412.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.89 : 533.69 = 274.79 : x
  2. Step 2: Convert to fraction form
    355.89/533.69 = 274.79/x
  3. Step 3: Cross multiply
    355.89x = 533.69 × 274.79
  4. Step 4: Simplify right side
    355.89x = 146,653.67
  5. Step 5: Solve for x
    x = 146,653.67/355.89
  6. Step 6: Final answer
    x = 412.07

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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.