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Finding the Fourth Proportional to 365.95, 548.32 and 257.55

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Solution

The fourth proportional to 365.95, 548.32 and 257.55 is: 385.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.95 : 548.32 = 257.55 : x
  2. Step 2: Convert to fraction form
    365.95/548.32 = 257.55/x
  3. Step 3: Cross multiply
    365.95x = 548.32 × 257.55
  4. Step 4: Simplify right side
    365.95x = 141,219.82
  5. Step 5: Solve for x
    x = 141,219.82/365.95
  6. Step 6: Final answer
    x = 385.90

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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.