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Finding the Fourth Proportional to 258.76, 384.89 and 245.80

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Solution

The fourth proportional to 258.76, 384.89 and 245.80 is: 365.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.76 : 384.89 = 245.80 : x
  2. Step 2: Convert to fraction form
    258.76/384.89 = 245.80/x
  3. Step 3: Cross multiply
    258.76x = 384.89 × 245.80
  4. Step 4: Simplify right side
    258.76x = 94,605.96
  5. Step 5: Solve for x
    x = 94,605.96/258.76
  6. Step 6: Final answer
    x = 365.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.