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Finding the Fourth Proportional to 889.26, 1,226.79 and 539.88

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Solution

The fourth proportional to 889.26, 1,226.79 and 539.88 is: 744.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.26 : 1,226.79 = 539.88 : x
  2. Step 2: Convert to fraction form
    889.26/1,226.79 = 539.88/x
  3. Step 3: Cross multiply
    889.26x = 1,226.79 × 539.88
  4. Step 4: Simplify right side
    889.26x = 662,319.39
  5. Step 5: Solve for x
    x = 662,319.39/889.26
  6. Step 6: Final answer
    x = 744.80

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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.