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Finding the Fourth Proportional to 638,658,400.80, 957,987,601.20 and 574,035,175.20

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Solution

The fourth proportional to 638,658,400.80, 957,987,601.20 and 574,035,175.20 is: 861,052,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,658,400.80 : 957,987,601.20 = 574,035,175.20 : x
  2. Step 2: Convert to fraction form
    638,658,400.80/957,987,601.20 = 574,035,175.20/x
  3. Step 3: Cross multiply
    638,658,400.80x = 957,987,601.20 × 574,035,175.20
  4. Step 4: Simplify right side
    638,658,400.80x = 549,918,580,494,269,824
  5. Step 5: Solve for x
    x = 549,918,580,494,269,824/638,658,400.80
  6. Step 6: Final answer
    x = 861,052,762.80

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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.