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Finding the Fourth Proportional to 398,554.50, 550,005.21 and 228,843.30

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Solution

The fourth proportional to 398,554.50, 550,005.21 and 228,843.30 is: 315,803.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,554.50 : 550,005.21 = 228,843.30 : x
  2. Step 2: Convert to fraction form
    398,554.50/550,005.21 = 228,843.30/x
  3. Step 3: Cross multiply
    398,554.50x = 550,005.21 × 228,843.30
  4. Step 4: Simplify right side
    398,554.50x = 125,865,007,273.59
  5. Step 5: Solve for x
    x = 125,865,007,273.59/398,554.50
  6. Step 6: Final answer
    x = 315,803.75

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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.