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Finding the Fourth Proportional to 299.16, 448.74 and 280.53

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Solution

The fourth proportional to 299.16, 448.74 and 280.53 is: 420.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.16 : 448.74 = 280.53 : x
  2. Step 2: Convert to fraction form
    299.16/448.74 = 280.53/x
  3. Step 3: Cross multiply
    299.16x = 448.74 × 280.53
  4. Step 4: Simplify right side
    299.16x = 125,885.03
  5. Step 5: Solve for x
    x = 125,885.03/299.16
  6. Step 6: Final answer
    x = 420.80

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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.