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Finding the Fourth Proportional to 525,939.40, 788,390.70 and 259,481.80

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Solution

The fourth proportional to 525,939.40, 788,390.70 and 259,481.80 is: 388,966.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,939.40 : 788,390.70 = 259,481.80 : x
  2. Step 2: Convert to fraction form
    525,939.40/788,390.70 = 259,481.80/x
  3. Step 3: Cross multiply
    525,939.40x = 788,390.70 × 259,481.80
  4. Step 4: Simplify right side
    525,939.40x = 204,573,037,939.26
  5. Step 5: Solve for x
    x = 204,573,037,939.26/525,939.40
  6. Step 6: Final answer
    x = 388,966.94

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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.