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Finding the Fourth Proportional to 744.23, 1,027.11 and 619.67

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Solution

The fourth proportional to 744.23, 1,027.11 and 619.67 is: 855.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.23 : 1,027.11 = 619.67 : x
  2. Step 2: Convert to fraction form
    744.23/1,027.11 = 619.67/x
  3. Step 3: Cross multiply
    744.23x = 1,027.11 × 619.67
  4. Step 4: Simplify right side
    744.23x = 636,469.25
  5. Step 5: Solve for x
    x = 636,469.25/744.23
  6. Step 6: Final answer
    x = 855.21

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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.