Home / 420,811.20-629,661.60-383,486.40

Finding the Fourth Proportional to 420,811.20, 629,661.60 and 383,486.40

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Solution

The fourth proportional to 420,811.20, 629,661.60 and 383,486.40 is: 573,812.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,811.20 : 629,661.60 = 383,486.40 : x
  2. Step 2: Convert to fraction form
    420,811.20/629,661.60 = 383,486.40/x
  3. Step 3: Cross multiply
    420,811.20x = 629,661.60 × 383,486.40
  4. Step 4: Simplify right side
    420,811.20x = 241,466,660,202.24
  5. Step 5: Solve for x
    x = 241,466,660,202.24/420,811.20
  6. Step 6: Final answer
    x = 573,812.34

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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.