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Finding the Fourth Proportional to 633,962,421.46, 874,504,660.77 and 395,393,420.71

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Solution

The fourth proportional to 633,962,421.46, 874,504,660.77 and 395,393,420.71 is: 545,416,222.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,962,421.46 : 874,504,660.77 = 395,393,420.71 : x
  2. Step 2: Convert to fraction form
    633,962,421.46/874,504,660.77 = 395,393,420.71/x
  3. Step 3: Cross multiply
    633,962,421.46x = 874,504,660.77 × 395,393,420.71
  4. Step 4: Simplify right side
    633,962,421.46x = 345,773,389,249,781,568
  5. Step 5: Solve for x
    x = 345,773,389,249,781,568/633,962,421.46
  6. Step 6: Final answer
    x = 545,416,222.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.