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Finding the Fourth Proportional to 258.74, 386.95 and 230.03

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Solution

The fourth proportional to 258.74, 386.95 and 230.03 is: 344.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.74 : 386.95 = 230.03 : x
  2. Step 2: Convert to fraction form
    258.74/386.95 = 230.03/x
  3. Step 3: Cross multiply
    258.74x = 386.95 × 230.03
  4. Step 4: Simplify right side
    258.74x = 89,010.11
  5. Step 5: Solve for x
    x = 89,010.11/258.74
  6. Step 6: Final answer
    x = 344.01

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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.