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Finding the Fourth Proportional to 257.02, 385.51 and 154.25

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Solution

The fourth proportional to 257.02, 385.51 and 154.25 is: 231.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.02 : 385.51 = 154.25 : x
  2. Step 2: Convert to fraction form
    257.02/385.51 = 154.25/x
  3. Step 3: Cross multiply
    257.02x = 385.51 × 154.25
  4. Step 4: Simplify right side
    257.02x = 59,466.51
  5. Step 5: Solve for x
    x = 59,466.51/257.02
  6. Step 6: Final answer
    x = 231.37

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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.