Home / 655,839.10-905,122.50-383,890.50

Finding the Fourth Proportional to 655,839.10, 905,122.50 and 383,890.50

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Solution

The fourth proportional to 655,839.10, 905,122.50 and 383,890.50 is: 529,806.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,839.10 : 905,122.50 = 383,890.50 : x
  2. Step 2: Convert to fraction form
    655,839.10/905,122.50 = 383,890.50/x
  3. Step 3: Cross multiply
    655,839.10x = 905,122.50 × 383,890.50
  4. Step 4: Simplify right side
    655,839.10x = 347,467,929,086.25
  5. Step 5: Solve for x
    x = 347,467,929,086.25/655,839.10
  6. Step 6: Final answer
    x = 529,806.67

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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.