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Finding the Fourth Proportional to 268.48, 403.07 and 257.50

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Solution

The fourth proportional to 268.48, 403.07 and 257.50 is: 386.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.48 : 403.07 = 257.50 : x
  2. Step 2: Convert to fraction form
    268.48/403.07 = 257.50/x
  3. Step 3: Cross multiply
    268.48x = 403.07 × 257.50
  4. Step 4: Simplify right side
    268.48x = 103,790.53
  5. Step 5: Solve for x
    x = 103,790.53/268.48
  6. Step 6: Final answer
    x = 386.59

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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.