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Finding the Fourth Proportional to 298.89, 448.40 and 106.51

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Solution

The fourth proportional to 298.89, 448.40 and 106.51 is: 159.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.89 : 448.40 = 106.51 : x
  2. Step 2: Convert to fraction form
    298.89/448.40 = 106.51/x
  3. Step 3: Cross multiply
    298.89x = 448.40 × 106.51
  4. Step 4: Simplify right side
    298.89x = 47,758.55
  5. Step 5: Solve for x
    x = 47,758.55/298.89
  6. Step 6: Final answer
    x = 159.79

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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.