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Finding the Fourth Proportional to 448.85, 673.40 and 140.74

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Solution

The fourth proportional to 448.85, 673.40 and 140.74 is: 211.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.85 : 673.40 = 140.74 : x
  2. Step 2: Convert to fraction form
    448.85/673.40 = 140.74/x
  3. Step 3: Cross multiply
    448.85x = 673.40 × 140.74
  4. Step 4: Simplify right side
    448.85x = 94,775.98
  5. Step 5: Solve for x
    x = 94,775.98/448.85
  6. Step 6: Final answer
    x = 211.15

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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.