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Finding the Fourth Proportional to 452.80, 679.28 and 192.80

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Solution

The fourth proportional to 452.80, 679.28 and 192.80 is: 289.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.80 : 679.28 = 192.80 : x
  2. Step 2: Convert to fraction form
    452.80/679.28 = 192.80/x
  3. Step 3: Cross multiply
    452.80x = 679.28 × 192.80
  4. Step 4: Simplify right side
    452.80x = 130,965.18
  5. Step 5: Solve for x
    x = 130,965.18/452.80
  6. Step 6: Final answer
    x = 289.23

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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.