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Finding the Fourth Proportional to 326.77, 450.32 and 256.66

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Solution

The fourth proportional to 326.77, 450.32 and 256.66 is: 353.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.77 : 450.32 = 256.66 : x
  2. Step 2: Convert to fraction form
    326.77/450.32 = 256.66/x
  3. Step 3: Cross multiply
    326.77x = 450.32 × 256.66
  4. Step 4: Simplify right side
    326.77x = 115,579.13
  5. Step 5: Solve for x
    x = 115,579.13/326.77
  6. Step 6: Final answer
    x = 353.70

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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.