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Finding the Fourth Proportional to 665.94, 998.68 and 243.58

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Solution

The fourth proportional to 665.94, 998.68 and 243.58 is: 365.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.94 : 998.68 = 243.58 : x
  2. Step 2: Convert to fraction form
    665.94/998.68 = 243.58/x
  3. Step 3: Cross multiply
    665.94x = 998.68 × 243.58
  4. Step 4: Simplify right side
    665.94x = 243,258.47
  5. Step 5: Solve for x
    x = 243,258.47/665.94
  6. Step 6: Final answer
    x = 365.29

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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.