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Finding the Fourth Proportional to 1,267.07, 1,899.99 and 445.39

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Solution

The fourth proportional to 1,267.07, 1,899.99 and 445.39 is: 667.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.07 : 1,899.99 = 445.39 : x
  2. Step 2: Convert to fraction form
    1,267.07/1,899.99 = 445.39/x
  3. Step 3: Cross multiply
    1,267.07x = 1,899.99 × 445.39
  4. Step 4: Simplify right side
    1,267.07x = 846,231.80
  5. Step 5: Solve for x
    x = 846,231.80/1,267.07
  6. Step 6: Final answer
    x = 667.87

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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.