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Finding the Fourth Proportional to 228,906, 315,890.28 and 128,304

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Solution

The fourth proportional to 228,906, 315,890.28 and 128,304 is: 177,059.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,906 : 315,890.28 = 128,304 : x
  2. Step 2: Convert to fraction form
    228,906/315,890.28 = 128,304/x
  3. Step 3: Cross multiply
    228,906x = 315,890.28 × 128,304
  4. Step 4: Simplify right side
    228,906x = 40,529,986,485.12
  5. Step 5: Solve for x
    x = 40,529,986,485.12/228,906
  6. Step 6: Final answer
    x = 177,059.52

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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.