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Finding the Fourth Proportional to 228,910.44, 315,879.24 and 128,289

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Solution

The fourth proportional to 228,910.44, 315,879.24 and 128,289 is: 177,029.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,910.44 : 315,879.24 = 128,289 : x
  2. Step 2: Convert to fraction form
    228,910.44/315,879.24 = 128,289/x
  3. Step 3: Cross multiply
    228,910.44x = 315,879.24 × 128,289
  4. Step 4: Simplify right side
    228,910.44x = 40,523,831,820.36
  5. Step 5: Solve for x
    x = 40,523,831,820.36/228,910.44
  6. Step 6: Final answer
    x = 177,029.20

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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.