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Finding the Fourth Proportional to 623.38, 859.46 and 426.55

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Solution

The fourth proportional to 623.38, 859.46 and 426.55 is: 588.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.38 : 859.46 = 426.55 : x
  2. Step 2: Convert to fraction form
    623.38/859.46 = 426.55/x
  3. Step 3: Cross multiply
    623.38x = 859.46 × 426.55
  4. Step 4: Simplify right side
    623.38x = 366,603.73
  5. Step 5: Solve for x
    x = 366,603.73/623.38
  6. Step 6: Final answer
    x = 588.09

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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.