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Finding the Fourth Proportional to 559.42, 771.20 and 426.64

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Solution

The fourth proportional to 559.42, 771.20 and 426.64 is: 588.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.42 : 771.20 = 426.64 : x
  2. Step 2: Convert to fraction form
    559.42/771.20 = 426.64/x
  3. Step 3: Cross multiply
    559.42x = 771.20 × 426.64
  4. Step 4: Simplify right side
    559.42x = 329,024.77
  5. Step 5: Solve for x
    x = 329,024.77/559.42
  6. Step 6: Final answer
    x = 588.15

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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.