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Finding the Fourth Proportional to 319,078.62, 440,328.59 and 173,884.44

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Solution

The fourth proportional to 319,078.62, 440,328.59 and 173,884.44 is: 239,960.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,078.62 : 440,328.59 = 173,884.44 : x
  2. Step 2: Convert to fraction form
    319,078.62/440,328.59 = 173,884.44/x
  3. Step 3: Cross multiply
    319,078.62x = 440,328.59 × 173,884.44
  4. Step 4: Simplify right side
    319,078.62x = 76,566,291,999.08
  5. Step 5: Solve for x
    x = 76,566,291,999.08/319,078.62
  6. Step 6: Final answer
    x = 239,960.58

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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.