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Finding the Fourth Proportional to 426, 639.04 and 377.70

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Solution

The fourth proportional to 426, 639.04 and 377.70 is: 566.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426 : 639.04 = 377.70 : x
  2. Step 2: Convert to fraction form
    426/639.04 = 377.70/x
  3. Step 3: Cross multiply
    426x = 639.04 × 377.70
  4. Step 4: Simplify right side
    426x = 241,365.41
  5. Step 5: Solve for x
    x = 241,365.41/426
  6. Step 6: Final answer
    x = 566.59

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.