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Finding the Fourth Proportional to 826.92, 1,237.98 and 622.32

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Solution

The fourth proportional to 826.92, 1,237.98 and 622.32 is: 931.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.92 : 1,237.98 = 622.32 : x
  2. Step 2: Convert to fraction form
    826.92/1,237.98 = 622.32/x
  3. Step 3: Cross multiply
    826.92x = 1,237.98 × 622.32
  4. Step 4: Simplify right side
    826.92x = 770,419.71
  5. Step 5: Solve for x
    x = 770,419.71/826.92
  6. Step 6: Final answer
    x = 931.67

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Why These Related Problems?

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