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Finding the Fourth Proportional to 492,745.41, 679,744.22 and 318,255.62

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Solution

The fourth proportional to 492,745.41, 679,744.22 and 318,255.62 is: 439,034.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,745.41 : 679,744.22 = 318,255.62 : x
  2. Step 2: Convert to fraction form
    492,745.41/679,744.22 = 318,255.62/x
  3. Step 3: Cross multiply
    492,745.41x = 679,744.22 × 318,255.62
  4. Step 4: Simplify right side
    492,745.41x = 216,332,413,187.52
  5. Step 5: Solve for x
    x = 216,332,413,187.52/492,745.41
  6. Step 6: Final answer
    x = 439,034.86

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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.