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Finding the Fourth Proportional to 482.20, 722.81 and 189.30

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Solution

The fourth proportional to 482.20, 722.81 and 189.30 is: 283.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.20 : 722.81 = 189.30 : x
  2. Step 2: Convert to fraction form
    482.20/722.81 = 189.30/x
  3. Step 3: Cross multiply
    482.20x = 722.81 × 189.30
  4. Step 4: Simplify right side
    482.20x = 136,823.37
  5. Step 5: Solve for x
    x = 136,823.37/482.20
  6. Step 6: Final answer
    x = 283.75

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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.