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Finding the Fourth Proportional to 268.99, 403.48 and 114.87

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Solution

The fourth proportional to 268.99, 403.48 and 114.87 is: 172.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.99 : 403.48 = 114.87 : x
  2. Step 2: Convert to fraction form
    268.99/403.48 = 114.87/x
  3. Step 3: Cross multiply
    268.99x = 403.48 × 114.87
  4. Step 4: Simplify right side
    268.99x = 46,347.46
  5. Step 5: Solve for x
    x = 46,347.46/268.99
  6. Step 6: Final answer
    x = 172.30

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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.