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Finding the Fourth Proportional to 383,553.80, 576,021.90 and 278,491.40

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Solution

The fourth proportional to 383,553.80, 576,021.90 and 278,491.40 is: 418,238.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,553.80 : 576,021.90 = 278,491.40 : x
  2. Step 2: Convert to fraction form
    383,553.80/576,021.90 = 278,491.40/x
  3. Step 3: Cross multiply
    383,553.80x = 576,021.90 × 278,491.40
  4. Step 4: Simplify right side
    383,553.80x = 160,417,145,361.66
  5. Step 5: Solve for x
    x = 160,417,145,361.66/383,553.80
  6. Step 6: Final answer
    x = 418,238.97

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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.