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Finding the Fourth Proportional to 419,801.20, 629,701.80 and 220,044.40

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Solution

The fourth proportional to 419,801.20, 629,701.80 and 220,044.40 is: 330,066.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,801.20 : 629,701.80 = 220,044.40 : x
  2. Step 2: Convert to fraction form
    419,801.20/629,701.80 = 220,044.40/x
  3. Step 3: Cross multiply
    419,801.20x = 629,701.80 × 220,044.40
  4. Step 4: Simplify right side
    419,801.20x = 138,562,354,759.92
  5. Step 5: Solve for x
    x = 138,562,354,759.92/419,801.20
  6. Step 6: Final answer
    x = 330,066.60

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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.