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Finding the Fourth Proportional to 258.04, 387.43 and 155.01

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Solution

The fourth proportional to 258.04, 387.43 and 155.01 is: 232.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.04 : 387.43 = 155.01 : x
  2. Step 2: Convert to fraction form
    258.04/387.43 = 155.01/x
  3. Step 3: Cross multiply
    258.04x = 387.43 × 155.01
  4. Step 4: Simplify right side
    258.04x = 60,057.46
  5. Step 5: Solve for x
    x = 60,057.46/258.04
  6. Step 6: Final answer
    x = 232.75

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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.