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Finding the Fourth Proportional to 260,970.89, 391,456.34 and 63,978.89

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Solution

The fourth proportional to 260,970.89, 391,456.34 and 63,978.89 is: 95,968.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,970.89 : 391,456.34 = 63,978.89 : x
  2. Step 2: Convert to fraction form
    260,970.89/391,456.34 = 63,978.89/x
  3. Step 3: Cross multiply
    260,970.89x = 391,456.34 × 63,978.89
  4. Step 4: Simplify right side
    260,970.89x = 25,044,942,101.41
  5. Step 5: Solve for x
    x = 25,044,942,101.41/260,970.89
  6. Step 6: Final answer
    x = 95,968.34

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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.