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Finding the Fourth Proportional to 641.40, 885.10 and 375.99

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Solution

The fourth proportional to 641.40, 885.10 and 375.99 is: 518.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.40 : 885.10 = 375.99 : x
  2. Step 2: Convert to fraction form
    641.40/885.10 = 375.99/x
  3. Step 3: Cross multiply
    641.40x = 885.10 × 375.99
  4. Step 4: Simplify right side
    641.40x = 332,788.75
  5. Step 5: Solve for x
    x = 332,788.75/641.40
  6. Step 6: Final answer
    x = 518.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.