Home / 419,904,821.20-629,857,231.80-386,648,424.40

Finding the Fourth Proportional to 419,904,821.20, 629,857,231.80 and 386,648,424.40

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Solution

The fourth proportional to 419,904,821.20, 629,857,231.80 and 386,648,424.40 is: 579,972,636.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,821.20 : 629,857,231.80 = 386,648,424.40 : x
  2. Step 2: Convert to fraction form
    419,904,821.20/629,857,231.80 = 386,648,424.40/x
  3. Step 3: Cross multiply
    419,904,821.20x = 629,857,231.80 × 386,648,424.40
  4. Step 4: Simplify right side
    419,904,821.20x = 243,533,306,272,415,552
  5. Step 5: Solve for x
    x = 243,533,306,272,415,552/419,904,821.20
  6. Step 6: Final answer
    x = 579,972,636.60

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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.