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Finding the Fourth Proportional to 298.76, 448.18 and 144.72

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Solution

The fourth proportional to 298.76, 448.18 and 144.72 is: 217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.76 : 448.18 = 144.72 : x
  2. Step 2: Convert to fraction form
    298.76/448.18 = 144.72/x
  3. Step 3: Cross multiply
    298.76x = 448.18 × 144.72
  4. Step 4: Simplify right side
    298.76x = 64,860.61
  5. Step 5: Solve for x
    x = 64,860.61/298.76
  6. Step 6: Final answer
    x = 217.10

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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.