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Finding the Fourth Proportional to 639.24, 958.62 and 297

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Solution

The fourth proportional to 639.24, 958.62 and 297 is: 445.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.24 : 958.62 = 297 : x
  2. Step 2: Convert to fraction form
    639.24/958.62 = 297/x
  3. Step 3: Cross multiply
    639.24x = 958.62 × 297
  4. Step 4: Simplify right side
    639.24x = 284,710.14
  5. Step 5: Solve for x
    x = 284,710.14/639.24
  6. Step 6: Final answer
    x = 445.39

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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.