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Finding the Fourth Proportional to 445.14, 667.80 and 307.80

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Solution

The fourth proportional to 445.14, 667.80 and 307.80 is: 461.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.14 : 667.80 = 307.80 : x
  2. Step 2: Convert to fraction form
    445.14/667.80 = 307.80/x
  3. Step 3: Cross multiply
    445.14x = 667.80 × 307.80
  4. Step 4: Simplify right side
    445.14x = 205,548.84
  5. Step 5: Solve for x
    x = 205,548.84/445.14
  6. Step 6: Final answer
    x = 461.76

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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.