Home / 419,904,587.20-629,856,880.80-389,293,585.60

Finding the Fourth Proportional to 419,904,587.20, 629,856,880.80 and 389,293,585.60

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Solution

The fourth proportional to 419,904,587.20, 629,856,880.80 and 389,293,585.60 is: 583,940,378.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,587.20 : 629,856,880.80 = 389,293,585.60 : x
  2. Step 2: Convert to fraction form
    419,904,587.20/629,856,880.80 = 389,293,585.60/x
  3. Step 3: Cross multiply
    419,904,587.20x = 629,856,880.80 × 389,293,585.60
  4. Step 4: Simplify right side
    419,904,587.20x = 245,199,243,541,463,808
  5. Step 5: Solve for x
    x = 245,199,243,541,463,808/419,904,587.20
  6. Step 6: Final answer
    x = 583,940,378.40

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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.