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Finding the Fourth Proportional to 228,888, 315,865.44 and 128,286.72

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Solution

The fourth proportional to 228,888, 315,865.44 and 128,286.72 is: 177,035.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,888 : 315,865.44 = 128,286.72 : x
  2. Step 2: Convert to fraction form
    228,888/315,865.44 = 128,286.72/x
  3. Step 3: Cross multiply
    228,888x = 315,865.44 × 128,286.72
  4. Step 4: Simplify right side
    228,888x = 40,521,341,258.96
  5. Step 5: Solve for x
    x = 40,521,341,258.96/228,888
  6. Step 6: Final answer
    x = 177,035.67

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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.