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Finding the Fourth Proportional to 427.37, 639.99 and 358.73

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Solution

The fourth proportional to 427.37, 639.99 and 358.73 is: 537.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.37 : 639.99 = 358.73 : x
  2. Step 2: Convert to fraction form
    427.37/639.99 = 358.73/x
  3. Step 3: Cross multiply
    427.37x = 639.99 × 358.73
  4. Step 4: Simplify right side
    427.37x = 229,583.61
  5. Step 5: Solve for x
    x = 229,583.61/427.37
  6. Step 6: Final answer
    x = 537.20

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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.