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Finding the Fourth Proportional to 228,632.87, 315,532.74 and 126,690.30

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Solution

The fourth proportional to 228,632.87, 315,532.74 and 126,690.30 is: 174,843.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,632.87 : 315,532.74 = 126,690.30 : x
  2. Step 2: Convert to fraction form
    228,632.87/315,532.74 = 126,690.30/x
  3. Step 3: Cross multiply
    228,632.87x = 315,532.74 × 126,690.30
  4. Step 4: Simplify right side
    228,632.87x = 39,974,936,856.97
  5. Step 5: Solve for x
    x = 39,974,936,856.97/228,632.87
  6. Step 6: Final answer
    x = 174,843.35

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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.