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Finding the Fourth Proportional to 260,821.65, 391,250.70 and 103,029.60

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Solution

The fourth proportional to 260,821.65, 391,250.70 and 103,029.60 is: 154,551.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,821.65 : 391,250.70 = 103,029.60 : x
  2. Step 2: Convert to fraction form
    260,821.65/391,250.70 = 103,029.60/x
  3. Step 3: Cross multiply
    260,821.65x = 391,250.70 × 103,029.60
  4. Step 4: Simplify right side
    260,821.65x = 40,310,403,120.72
  5. Step 5: Solve for x
    x = 40,310,403,120.72/260,821.65
  6. Step 6: Final answer
    x = 154,551.60

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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.