Home / 318,028.86-438,697.08-198,589.50

Finding the Fourth Proportional to 318,028.86, 438,697.08 and 198,589.50

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Solution

The fourth proportional to 318,028.86, 438,697.08 and 198,589.50 is: 273,939.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,028.86 : 438,697.08 = 198,589.50 : x
  2. Step 2: Convert to fraction form
    318,028.86/438,697.08 = 198,589.50/x
  3. Step 3: Cross multiply
    318,028.86x = 438,697.08 × 198,589.50
  4. Step 4: Simplify right side
    318,028.86x = 87,120,633,768.66
  5. Step 5: Solve for x
    x = 87,120,633,768.66/318,028.86
  6. Step 6: Final answer
    x = 273,939.40

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1.5x scale

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.