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Finding the Fourth Proportional to 448.77, 672.20 and 205.50

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Solution

The fourth proportional to 448.77, 672.20 and 205.50 is: 307.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.77 : 672.20 = 205.50 : x
  2. Step 2: Convert to fraction form
    448.77/672.20 = 205.50/x
  3. Step 3: Cross multiply
    448.77x = 672.20 × 205.50
  4. Step 4: Simplify right side
    448.77x = 138,133.74
  5. Step 5: Solve for x
    x = 138,133.74/448.77
  6. Step 6: Final answer
    x = 307.81

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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.