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Finding the Fourth Proportional to 452.21, 677.75 and 257.37

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Solution

The fourth proportional to 452.21, 677.75 and 257.37 is: 385.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.21 : 677.75 = 257.37 : x
  2. Step 2: Convert to fraction form
    452.21/677.75 = 257.37/x
  3. Step 3: Cross multiply
    452.21x = 677.75 × 257.37
  4. Step 4: Simplify right side
    452.21x = 174,433.16
  5. Step 5: Solve for x
    x = 174,433.16/452.21
  6. Step 6: Final answer
    x = 385.74

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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.