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Finding the Fourth Proportional to 559.05, 771.30 and 346.20

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Solution

The fourth proportional to 559.05, 771.30 and 346.20 is: 477.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.05 : 771.30 = 346.20 : x
  2. Step 2: Convert to fraction form
    559.05/771.30 = 346.20/x
  3. Step 3: Cross multiply
    559.05x = 771.30 × 346.20
  4. Step 4: Simplify right side
    559.05x = 267,022.36
  5. Step 5: Solve for x
    x = 267,022.36/559.05
  6. Step 6: Final answer
    x = 477.63

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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.