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Finding the Fourth Proportional to 448.82, 673.21 and 140.66

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Solution

The fourth proportional to 448.82, 673.21 and 140.66 is: 210.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.82 : 673.21 = 140.66 : x
  2. Step 2: Convert to fraction form
    448.82/673.21 = 140.66/x
  3. Step 3: Cross multiply
    448.82x = 673.21 × 140.66
  4. Step 4: Simplify right side
    448.82x = 94,689.65
  5. Step 5: Solve for x
    x = 94,689.65/448.82
  6. Step 6: Final answer
    x = 210.98

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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.