Home / 629,218.09-868,321.34-342,739.45

Finding the Fourth Proportional to 629,218.09, 868,321.34 and 342,739.45

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Solution

The fourth proportional to 629,218.09, 868,321.34 and 342,739.45 is: 472,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,218.09 : 868,321.34 = 342,739.45 : x
  2. Step 2: Convert to fraction form
    629,218.09/868,321.34 = 342,739.45/x
  3. Step 3: Cross multiply
    629,218.09x = 868,321.34 × 342,739.45
  4. Step 4: Simplify right side
    629,218.09x = 297,607,978,494.86
  5. Step 5: Solve for x
    x = 297,607,978,494.86/629,218.09
  6. Step 6: Final answer
    x = 472,980.65

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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.