Home / 603,613,880.20-905,420,820.30-428,261,969.80

Finding the Fourth Proportional to 603,613,880.20, 905,420,820.30 and 428,261,969.80

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Solution

The fourth proportional to 603,613,880.20, 905,420,820.30 and 428,261,969.80 is: 642,392,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,613,880.20 : 905,420,820.30 = 428,261,969.80 : x
  2. Step 2: Convert to fraction form
    603,613,880.20/905,420,820.30 = 428,261,969.80/x
  3. Step 3: Cross multiply
    603,613,880.20x = 905,420,820.30 × 428,261,969.80
  4. Step 4: Simplify right side
    603,613,880.20x = 387,757,303,999,609,792
  5. Step 5: Solve for x
    x = 387,757,303,999,609,792/603,613,880.20
  6. Step 6: Final answer
    x = 642,392,954.70

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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.