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Finding the Fourth Proportional to 665.79, 998.39 and 300.51

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Solution

The fourth proportional to 665.79, 998.39 and 300.51 is: 450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.79 : 998.39 = 300.51 : x
  2. Step 2: Convert to fraction form
    665.79/998.39 = 300.51/x
  3. Step 3: Cross multiply
    665.79x = 998.39 × 300.51
  4. Step 4: Simplify right side
    665.79x = 300,026.93
  5. Step 5: Solve for x
    x = 300,026.93/665.79
  6. Step 6: Final answer
    x = 450.64

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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.