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Finding the Fourth Proportional to 482.78, 723.62 and 193.88

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Solution

The fourth proportional to 482.78, 723.62 and 193.88 is: 290.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.78 : 723.62 = 193.88 : x
  2. Step 2: Convert to fraction form
    482.78/723.62 = 193.88/x
  3. Step 3: Cross multiply
    482.78x = 723.62 × 193.88
  4. Step 4: Simplify right side
    482.78x = 140,295.45
  5. Step 5: Solve for x
    x = 140,295.45/482.78
  6. Step 6: Final answer
    x = 290.60

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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.