Home / 419,904,428.80-629,856,643.20-389,293,427.20

Finding the Fourth Proportional to 419,904,428.80, 629,856,643.20 and 389,293,427.20

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Solution

The fourth proportional to 419,904,428.80, 629,856,643.20 and 389,293,427.20 is: 583,940,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,428.80 : 629,856,643.20 = 389,293,427.20 : x
  2. Step 2: Convert to fraction form
    419,904,428.80/629,856,643.20 = 389,293,427.20/x
  3. Step 3: Cross multiply
    419,904,428.80x = 629,856,643.20 × 389,293,427.20
  4. Step 4: Simplify right side
    419,904,428.80x = 245,199,051,276,015,584
  5. Step 5: Solve for x
    x = 245,199,051,276,015,584/419,904,428.80
  6. Step 6: Final answer
    x = 583,940,140.80

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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.