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Finding the Fourth Proportional to 734.22, 1,012.70 and 439.26

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Solution

The fourth proportional to 734.22, 1,012.70 and 439.26 is: 605.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.22 : 1,012.70 = 439.26 : x
  2. Step 2: Convert to fraction form
    734.22/1,012.70 = 439.26/x
  3. Step 3: Cross multiply
    734.22x = 1,012.70 × 439.26
  4. Step 4: Simplify right side
    734.22x = 444,838.60
  5. Step 5: Solve for x
    x = 444,838.60/734.22
  6. Step 6: Final answer
    x = 605.87

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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.