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Finding the Fourth Proportional to 383,169.81, 528,790.77 and 213,403.98

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Solution

The fourth proportional to 383,169.81, 528,790.77 and 213,403.98 is: 294,506.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,169.81 : 528,790.77 = 213,403.98 : x
  2. Step 2: Convert to fraction form
    383,169.81/528,790.77 = 213,403.98/x
  3. Step 3: Cross multiply
    383,169.81x = 528,790.77 × 213,403.98
  4. Step 4: Simplify right side
    383,169.81x = 112,846,054,905.27
  5. Step 5: Solve for x
    x = 112,846,054,905.27/383,169.81
  6. Step 6: Final answer
    x = 294,506.64

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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.