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Finding the Fourth Proportional to 889.56, 1,226.09 and 609.32

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Solution

The fourth proportional to 889.56, 1,226.09 and 609.32 is: 839.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.56 : 1,226.09 = 609.32 : x
  2. Step 2: Convert to fraction form
    889.56/1,226.09 = 609.32/x
  3. Step 3: Cross multiply
    889.56x = 1,226.09 × 609.32
  4. Step 4: Simplify right side
    889.56x = 747,071.98
  5. Step 5: Solve for x
    x = 747,071.98/889.56
  6. Step 6: Final answer
    x = 839.82

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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.