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Finding the Fourth Proportional to 319,940.40, 479,219.40 and 264,644.40

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Solution

The fourth proportional to 319,940.40, 479,219.40 and 264,644.40 is: 396,394.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,940.40 : 479,219.40 = 264,644.40 : x
  2. Step 2: Convert to fraction form
    319,940.40/479,219.40 = 264,644.40/x
  3. Step 3: Cross multiply
    319,940.40x = 479,219.40 × 264,644.40
  4. Step 4: Simplify right side
    319,940.40x = 126,822,730,581.36
  5. Step 5: Solve for x
    x = 126,822,730,581.36/319,940.40
  6. Step 6: Final answer
    x = 396,394.86

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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.