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Finding the Fourth Proportional to 228,867, 315,849.44 and 128,271.48

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Solution

The fourth proportional to 228,867, 315,849.44 and 128,271.48 is: 177,021.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,867 : 315,849.44 = 128,271.48 : x
  2. Step 2: Convert to fraction form
    228,867/315,849.44 = 128,271.48/x
  3. Step 3: Cross multiply
    228,867x = 315,849.44 × 128,271.48
  4. Step 4: Simplify right side
    228,867x = 40,514,475,125.97
  5. Step 5: Solve for x
    x = 40,514,475,125.97/228,867
  6. Step 6: Final answer
    x = 177,021.92

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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.