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Finding the Fourth Proportional to 639, 958.32 and 248.94

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Solution

The fourth proportional to 639, 958.32 and 248.94 is: 373.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    639 : 958.32 = 248.94 : x
  2. Step 2: Convert to fraction form
    639/958.32 = 248.94/x
  3. Step 3: Cross multiply
    639x = 958.32 × 248.94
  4. Step 4: Simplify right side
    639x = 238,564.18
  5. Step 5: Solve for x
    x = 238,564.18/639
  6. Step 6: Final answer
    x = 373.34

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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.