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Finding the Fourth Proportional to 639.14, 957.93 and 365.36

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Solution

The fourth proportional to 639.14, 957.93 and 365.36 is: 547.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.14 : 957.93 = 365.36 : x
  2. Step 2: Convert to fraction form
    639.14/957.93 = 365.36/x
  3. Step 3: Cross multiply
    639.14x = 957.93 × 365.36
  4. Step 4: Simplify right side
    639.14x = 349,989.30
  5. Step 5: Solve for x
    x = 349,989.30/639.14
  6. Step 6: Final answer
    x = 547.59

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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.