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Finding the Fourth Proportional to 997.60, 1,377.33 and 625.09

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Solution

The fourth proportional to 997.60, 1,377.33 and 625.09 is: 863.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.60 : 1,377.33 = 625.09 : x
  2. Step 2: Convert to fraction form
    997.60/1,377.33 = 625.09/x
  3. Step 3: Cross multiply
    997.60x = 1,377.33 × 625.09
  4. Step 4: Simplify right side
    997.60x = 860,955.21
  5. Step 5: Solve for x
    x = 860,955.21/997.60
  6. Step 6: Final answer
    x = 863.03

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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.