Home / 419,905,019.80-629,857,529.70-389,294,018.20

Finding the Fourth Proportional to 419,905,019.80, 629,857,529.70 and 389,294,018.20

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Solution

The fourth proportional to 419,905,019.80, 629,857,529.70 and 389,294,018.20 is: 583,941,027.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,905,019.80 : 629,857,529.70 = 389,294,018.20 : x
  2. Step 2: Convert to fraction form
    419,905,019.80/629,857,529.70 = 389,294,018.20/x
  3. Step 3: Cross multiply
    419,905,019.80x = 629,857,529.70 × 389,294,018.20
  4. Step 4: Simplify right side
    419,905,019.80x = 245,199,768,630,438,848
  5. Step 5: Solve for x
    x = 245,199,768,630,438,848/419,905,019.80
  6. Step 6: Final answer
    x = 583,941,027.30

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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.