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Finding the Fourth Proportional to 419,890.40, 629,835.60 and 383,148.80

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Solution

The fourth proportional to 419,890.40, 629,835.60 and 383,148.80 is: 574,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,890.40 : 629,835.60 = 383,148.80 : x
  2. Step 2: Convert to fraction form
    419,890.40/629,835.60 = 383,148.80/x
  3. Step 3: Cross multiply
    419,890.40x = 629,835.60 × 383,148.80
  4. Step 4: Simplify right side
    419,890.40x = 241,320,754,337.28
  5. Step 5: Solve for x
    x = 241,320,754,337.28/419,890.40
  6. Step 6: Final answer
    x = 574,723.20

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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.