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Finding the Fourth Proportional to 318,657.90, 439,753.53 and 173,467.88

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Solution

The fourth proportional to 318,657.90, 439,753.53 and 173,467.88 is: 239,388.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,657.90 : 439,753.53 = 173,467.88 : x
  2. Step 2: Convert to fraction form
    318,657.90/439,753.53 = 173,467.88/x
  3. Step 3: Cross multiply
    318,657.90x = 439,753.53 × 173,467.88
  4. Step 4: Simplify right side
    318,657.90x = 76,283,112,571.62
  5. Step 5: Solve for x
    x = 76,283,112,571.62/318,657.90
  6. Step 6: Final answer
    x = 239,388.74

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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.