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Finding the Fourth Proportional to 511,280.68, 765,736.95 and 254,645.80

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Solution

The fourth proportional to 511,280.68, 765,736.95 and 254,645.80 is: 381,378.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,280.68 : 765,736.95 = 254,645.80 : x
  2. Step 2: Convert to fraction form
    511,280.68/765,736.95 = 254,645.80/x
  3. Step 3: Cross multiply
    511,280.68x = 765,736.95 × 254,645.80
  4. Step 4: Simplify right side
    511,280.68x = 194,991,698,222.31
  5. Step 5: Solve for x
    x = 194,991,698,222.31/511,280.68
  6. Step 6: Final answer
    x = 381,378.97

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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.