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Finding the Fourth Proportional to 258.51, 386.99 and 167.03

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Solution

The fourth proportional to 258.51, 386.99 and 167.03 is: 250.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.51 : 386.99 = 167.03 : x
  2. Step 2: Convert to fraction form
    258.51/386.99 = 167.03/x
  3. Step 3: Cross multiply
    258.51x = 386.99 × 167.03
  4. Step 4: Simplify right side
    258.51x = 64,638.94
  5. Step 5: Solve for x
    x = 64,638.94/258.51
  6. Step 6: Final answer
    x = 250.04

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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.