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Finding the Fourth Proportional to 950.56, 1,310.22 and 717.28

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Solution

The fourth proportional to 950.56, 1,310.22 and 717.28 is: 988.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.56 : 1,310.22 = 717.28 : x
  2. Step 2: Convert to fraction form
    950.56/1,310.22 = 717.28/x
  3. Step 3: Cross multiply
    950.56x = 1,310.22 × 717.28
  4. Step 4: Simplify right side
    950.56x = 939,794.60
  5. Step 5: Solve for x
    x = 939,794.60/950.56
  6. Step 6: Final answer
    x = 988.67

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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.