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Finding the Fourth Proportional to 298.69, 448.17 and 103.68

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Solution

The fourth proportional to 298.69, 448.17 and 103.68 is: 155.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.69 : 448.17 = 103.68 : x
  2. Step 2: Convert to fraction form
    298.69/448.17 = 103.68/x
  3. Step 3: Cross multiply
    298.69x = 448.17 × 103.68
  4. Step 4: Simplify right side
    298.69x = 46,465.88
  5. Step 5: Solve for x
    x = 46,465.88/298.69
  6. Step 6: Final answer
    x = 155.57

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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.