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Finding the Fourth Proportional to 889.92, 1,228.04 and 496.94

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Solution

The fourth proportional to 889.92, 1,228.04 and 496.94 is: 685.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.92 : 1,228.04 = 496.94 : x
  2. Step 2: Convert to fraction form
    889.92/1,228.04 = 496.94/x
  3. Step 3: Cross multiply
    889.92x = 1,228.04 × 496.94
  4. Step 4: Simplify right side
    889.92x = 610,262.20
  5. Step 5: Solve for x
    x = 610,262.20/889.92
  6. Step 6: Final answer
    x = 685.75

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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.