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Finding the Fourth Proportional to 448.24, 672 and 274.72

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Solution

The fourth proportional to 448.24, 672 and 274.72 is: 411.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.24 : 672 = 274.72 : x
  2. Step 2: Convert to fraction form
    448.24/672 = 274.72/x
  3. Step 3: Cross multiply
    448.24x = 672 × 274.72
  4. Step 4: Simplify right side
    448.24x = 184,611.84
  5. Step 5: Solve for x
    x = 184,611.84/448.24
  6. Step 6: Final answer
    x = 411.86

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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.