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Finding the Fourth Proportional to 862.50, 1,190.82 and 662.97

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Solution

The fourth proportional to 862.50, 1,190.82 and 662.97 is: 915.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.50 : 1,190.82 = 662.97 : x
  2. Step 2: Convert to fraction form
    862.50/1,190.82 = 662.97/x
  3. Step 3: Cross multiply
    862.50x = 1,190.82 × 662.97
  4. Step 4: Simplify right side
    862.50x = 789,477.94
  5. Step 5: Solve for x
    x = 789,477.94/862.50
  6. Step 6: Final answer
    x = 915.34

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1.5x scale

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.