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Finding the Fourth Proportional to 298.99, 448.13 and 207.87

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Solution

The fourth proportional to 298.99, 448.13 and 207.87 is: 311.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.99 : 448.13 = 207.87 : x
  2. Step 2: Convert to fraction form
    298.99/448.13 = 207.87/x
  3. Step 3: Cross multiply
    298.99x = 448.13 × 207.87
  4. Step 4: Simplify right side
    298.99x = 93,151.62
  5. Step 5: Solve for x
    x = 93,151.62/298.99
  6. Step 6: Final answer
    x = 311.55

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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.