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Finding the Fourth Proportional to 318,571.21, 439,619.94 and 173,379.89

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Solution

The fourth proportional to 318,571.21, 439,619.94 and 173,379.89 is: 239,259.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,571.21 : 439,619.94 = 173,379.89 : x
  2. Step 2: Convert to fraction form
    318,571.21/439,619.94 = 173,379.89/x
  3. Step 3: Cross multiply
    318,571.21x = 439,619.94 × 173,379.89
  4. Step 4: Simplify right side
    318,571.21x = 76,221,257,938.06
  5. Step 5: Solve for x
    x = 76,221,257,938.06/318,571.21
  6. Step 6: Final answer
    x = 239,259.72

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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.