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Finding the Fourth Proportional to 326.07, 450.08 and 309.54

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Solution

The fourth proportional to 326.07, 450.08 and 309.54 is: 427.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.07 : 450.08 = 309.54 : x
  2. Step 2: Convert to fraction form
    326.07/450.08 = 309.54/x
  3. Step 3: Cross multiply
    326.07x = 450.08 × 309.54
  4. Step 4: Simplify right side
    326.07x = 139,317.76
  5. Step 5: Solve for x
    x = 139,317.76/326.07
  6. Step 6: Final answer
    x = 427.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.