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Finding the Fourth Proportional to 319,171.37, 440,450.49 and 173,978.53

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Solution

The fourth proportional to 319,171.37, 440,450.49 and 173,978.53 is: 240,087.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,171.37 : 440,450.49 = 173,978.53 : x
  2. Step 2: Convert to fraction form
    319,171.37/440,450.49 = 173,978.53/x
  3. Step 3: Cross multiply
    319,171.37x = 440,450.49 × 173,978.53
  4. Step 4: Simplify right side
    319,171.37x = 76,628,928,339.27
  5. Step 5: Solve for x
    x = 76,628,928,339.27/319,171.37
  6. Step 6: Final answer
    x = 240,087.10

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1.5x scale

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.