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Finding the Fourth Proportional to 395,391.20, 593,480.46 and 217,981.76

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Solution

The fourth proportional to 395,391.20, 593,480.46 and 217,981.76 is: 327,189.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,391.20 : 593,480.46 = 217,981.76 : x
  2. Step 2: Convert to fraction form
    395,391.20/593,480.46 = 217,981.76/x
  3. Step 3: Cross multiply
    395,391.20x = 593,480.46 × 217,981.76
  4. Step 4: Simplify right side
    395,391.20x = 129,367,915,196.41
  5. Step 5: Solve for x
    x = 129,367,915,196.41/395,391.20
  6. Step 6: Final answer
    x = 327,189.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.