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Finding the Fourth Proportional to 311,321.10, 466,981.65 and 280,812.45

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Solution

The fourth proportional to 311,321.10, 466,981.65 and 280,812.45 is: 421,218.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,321.10 : 466,981.65 = 280,812.45 : x
  2. Step 2: Convert to fraction form
    311,321.10/466,981.65 = 280,812.45/x
  3. Step 3: Cross multiply
    311,321.10x = 466,981.65 × 280,812.45
  4. Step 4: Simplify right side
    311,321.10x = 131,134,261,241.54
  5. Step 5: Solve for x
    x = 131,134,261,241.54/311,321.10
  6. Step 6: Final answer
    x = 421,218.68

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1.5x scale

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.