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Finding the Fourth Proportional to 481,861, 664,977.78 and 280,669.96

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Solution

The fourth proportional to 481,861, 664,977.78 and 280,669.96 is: 387,330.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,861 : 664,977.78 = 280,669.96 : x
  2. Step 2: Convert to fraction form
    481,861/664,977.78 = 280,669.96/x
  3. Step 3: Cross multiply
    481,861x = 664,977.78 × 280,669.96
  4. Step 4: Simplify right side
    481,861x = 186,639,286,913.49
  5. Step 5: Solve for x
    x = 186,639,286,913.49/481,861
  6. Step 6: Final answer
    x = 387,330.14

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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.