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Finding the Fourth Proportional to 319,908.25, 479,861 and 130,326.33

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Solution

The fourth proportional to 319,908.25, 479,861 and 130,326.33 is: 195,488.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,908.25 : 479,861 = 130,326.33 : x
  2. Step 2: Convert to fraction form
    319,908.25/479,861 = 130,326.33/x
  3. Step 3: Cross multiply
    319,908.25x = 479,861 × 130,326.33
  4. Step 4: Simplify right side
    319,908.25x = 62,538,523,040.13
  5. Step 5: Solve for x
    x = 62,538,523,040.13/319,908.25
  6. Step 6: Final answer
    x = 195,488.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.