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Finding the Fourth Proportional to 398,936.40, 550,626.72 and 229,268.88

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Solution

The fourth proportional to 398,936.40, 550,626.72 and 229,268.88 is: 316,445.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,936.40 : 550,626.72 = 229,268.88 : x
  2. Step 2: Convert to fraction form
    398,936.40/550,626.72 = 229,268.88/x
  3. Step 3: Cross multiply
    398,936.40x = 550,626.72 × 229,268.88
  4. Step 4: Simplify right side
    398,936.40x = 126,241,571,392.47
  5. Step 5: Solve for x
    x = 126,241,571,392.47/398,936.40
  6. Step 6: Final answer
    x = 316,445.36

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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.