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Finding the Fourth Proportional to 639.34, 958.20 and 365.58

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Solution

The fourth proportional to 639.34, 958.20 and 365.58 is: 547.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.34 : 958.20 = 365.58 : x
  2. Step 2: Convert to fraction form
    639.34/958.20 = 365.58/x
  3. Step 3: Cross multiply
    639.34x = 958.20 × 365.58
  4. Step 4: Simplify right side
    639.34x = 350,298.76
  5. Step 5: Solve for x
    x = 350,298.76/639.34
  6. Step 6: Final answer
    x = 547.91

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.