Home / 317,890.86-438,506.91-198,451.50

Finding the Fourth Proportional to 317,890.86, 438,506.91 and 198,451.50

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Solution

The fourth proportional to 317,890.86, 438,506.91 and 198,451.50 is: 273,749.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,890.86 : 438,506.91 = 198,451.50 : x
  2. Step 2: Convert to fraction form
    317,890.86/438,506.91 = 198,451.50/x
  3. Step 3: Cross multiply
    317,890.86x = 438,506.91 × 198,451.50
  4. Step 4: Simplify right side
    317,890.86x = 87,022,354,049.87
  5. Step 5: Solve for x
    x = 87,022,354,049.87/317,890.86
  6. Step 6: Final answer
    x = 273,749.15

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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.