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Finding the Fourth Proportional to 278,018.55, 383,631.25 and 197,416.67

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Solution

The fourth proportional to 278,018.55, 383,631.25 and 197,416.67 is: 272,410.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,018.55 : 383,631.25 = 197,416.67 : x
  2. Step 2: Convert to fraction form
    278,018.55/383,631.25 = 197,416.67/x
  3. Step 3: Cross multiply
    278,018.55x = 383,631.25 × 197,416.67
  4. Step 4: Simplify right side
    278,018.55x = 75,735,203,882.94
  5. Step 5: Solve for x
    x = 75,735,203,882.94/278,018.55
  6. Step 6: Final answer
    x = 272,410.61

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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.