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Finding the Fourth Proportional to 298.60, 411.99 and 188.03

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Solution

The fourth proportional to 298.60, 411.99 and 188.03 is: 259.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.60 : 411.99 = 188.03 : x
  2. Step 2: Convert to fraction form
    298.60/411.99 = 188.03/x
  3. Step 3: Cross multiply
    298.60x = 411.99 × 188.03
  4. Step 4: Simplify right side
    298.60x = 77,466.80
  5. Step 5: Solve for x
    x = 77,466.80/298.60
  6. Step 6: Final answer
    x = 259.44

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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.