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Finding the Fourth Proportional to 298.68, 448.05 and 103.65

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Solution

The fourth proportional to 298.68, 448.05 and 103.65 is: 155.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.68 : 448.05 = 103.65 : x
  2. Step 2: Convert to fraction form
    298.68/448.05 = 103.65/x
  3. Step 3: Cross multiply
    298.68x = 448.05 × 103.65
  4. Step 4: Simplify right side
    298.68x = 46,440.38
  5. Step 5: Solve for x
    x = 46,440.38/298.68
  6. Step 6: Final answer
    x = 155.49

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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.