Home / 419,906,599.80-629,859,899.70-389,295,598.20

Finding the Fourth Proportional to 419,906,599.80, 629,859,899.70 and 389,295,598.20

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Solution

The fourth proportional to 419,906,599.80, 629,859,899.70 and 389,295,598.20 is: 583,943,397.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,906,599.80 : 629,859,899.70 = 389,295,598.20 : x
  2. Step 2: Convert to fraction form
    419,906,599.80/629,859,899.70 = 389,295,598.20/x
  3. Step 3: Cross multiply
    419,906,599.80x = 629,859,899.70 × 389,295,598.20
  4. Step 4: Simplify right side
    419,906,599.80x = 245,201,686,435,903,520
  5. Step 5: Solve for x
    x = 245,201,686,435,903,520/419,906,599.80
  6. Step 6: Final answer
    x = 583,943,397.30

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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.