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Finding the Fourth Proportional to 559.13, 771.64 and 326.30

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Solution

The fourth proportional to 559.13, 771.64 and 326.30 is: 450.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.13 : 771.64 = 326.30 : x
  2. Step 2: Convert to fraction form
    559.13/771.64 = 326.30/x
  3. Step 3: Cross multiply
    559.13x = 771.64 × 326.30
  4. Step 4: Simplify right side
    559.13x = 251,781.46
  5. Step 5: Solve for x
    x = 251,781.46/559.13
  6. Step 6: Final answer
    x = 450.31

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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.