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Finding the Fourth Proportional to 734.09, 1,012.99 and 439.36

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Solution

The fourth proportional to 734.09, 1,012.99 and 439.36 is: 606.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.09 : 1,012.99 = 439.36 : x
  2. Step 2: Convert to fraction form
    734.09/1,012.99 = 439.36/x
  3. Step 3: Cross multiply
    734.09x = 1,012.99 × 439.36
  4. Step 4: Simplify right side
    734.09x = 445,060.02
  5. Step 5: Solve for x
    x = 445,060.02/734.09
  6. Step 6: Final answer
    x = 606.28

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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.