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Finding the Fourth Proportional to 568.03, 855.19 and 445.28

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Solution

The fourth proportional to 568.03, 855.19 and 445.28 is: 670.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.03 : 855.19 = 445.28 : x
  2. Step 2: Convert to fraction form
    568.03/855.19 = 445.28/x
  3. Step 3: Cross multiply
    568.03x = 855.19 × 445.28
  4. Step 4: Simplify right side
    568.03x = 380,800.09
  5. Step 5: Solve for x
    x = 380,800.09/568.03
  6. Step 6: Final answer
    x = 670.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.