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Finding the Fourth Proportional to 675.21, 930.81 and 475.44

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Solution

The fourth proportional to 675.21, 930.81 and 475.44 is: 655.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.21 : 930.81 = 475.44 : x
  2. Step 2: Convert to fraction form
    675.21/930.81 = 475.44/x
  3. Step 3: Cross multiply
    675.21x = 930.81 × 475.44
  4. Step 4: Simplify right side
    675.21x = 442,544.31
  5. Step 5: Solve for x
    x = 442,544.31/675.21
  6. Step 6: Final answer
    x = 655.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.