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Finding the Fourth Proportional to 228,913.44, 315,883.38 and 128,292

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Solution

The fourth proportional to 228,913.44, 315,883.38 and 128,292 is: 177,033.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,913.44 : 315,883.38 = 128,292 : x
  2. Step 2: Convert to fraction form
    228,913.44/315,883.38 = 128,292/x
  3. Step 3: Cross multiply
    228,913.44x = 315,883.38 × 128,292
  4. Step 4: Simplify right side
    228,913.44x = 40,525,310,586.96
  5. Step 5: Solve for x
    x = 40,525,310,586.96/228,913.44
  6. Step 6: Final answer
    x = 177,033.34

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1.5x scale

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.