Home / 603,613,881.20-905,420,821.80-428,261,970.80

Finding the Fourth Proportional to 603,613,881.20, 905,420,821.80 and 428,261,970.80

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Solution

The fourth proportional to 603,613,881.20, 905,420,821.80 and 428,261,970.80 is: 642,392,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,613,881.20 : 905,420,821.80 = 428,261,970.80 : x
  2. Step 2: Convert to fraction form
    603,613,881.20/905,420,821.80 = 428,261,970.80/x
  3. Step 3: Cross multiply
    603,613,881.20x = 905,420,821.80 × 428,261,970.80
  4. Step 4: Simplify right side
    603,613,881.20x = 387,757,305,547,423,616
  5. Step 5: Solve for x
    x = 387,757,305,547,423,616/603,613,881.20
  6. Step 6: Final answer
    x = 642,392,956.20

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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.