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Finding the Fourth Proportional to 258, 384.80 and 230.70

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Solution

The fourth proportional to 258, 384.80 and 230.70 is: 344.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    258 : 384.80 = 230.70 : x
  2. Step 2: Convert to fraction form
    258/384.80 = 230.70/x
  3. Step 3: Cross multiply
    258x = 384.80 × 230.70
  4. Step 4: Simplify right side
    258x = 88,773.36
  5. Step 5: Solve for x
    x = 88,773.36/258
  6. Step 6: Final answer
    x = 344.08

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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.