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Finding the Fourth Proportional to 300.43, 450.65 and 117.79

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Solution

The fourth proportional to 300.43, 450.65 and 117.79 is: 176.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.43 : 450.65 = 117.79 : x
  2. Step 2: Convert to fraction form
    300.43/450.65 = 117.79/x
  3. Step 3: Cross multiply
    300.43x = 450.65 × 117.79
  4. Step 4: Simplify right side
    300.43x = 53,082.06
  5. Step 5: Solve for x
    x = 53,082.06/300.43
  6. Step 6: Final answer
    x = 176.69

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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.