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Finding the Fourth Proportional to 319,787.69, 479,520.89 and 106,480.20

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Solution

The fourth proportional to 319,787.69, 479,520.89 and 106,480.20 is: 159,666.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,787.69 : 479,520.89 = 106,480.20 : x
  2. Step 2: Convert to fraction form
    319,787.69/479,520.89 = 106,480.20/x
  3. Step 3: Cross multiply
    319,787.69x = 479,520.89 × 106,480.20
  4. Step 4: Simplify right side
    319,787.69x = 51,059,479,738.98
  5. Step 5: Solve for x
    x = 51,059,479,738.98/319,787.69
  6. Step 6: Final answer
    x = 159,666.81

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1.5x scale

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.