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Finding the Fourth Proportional to 260,885.28, 391,106.88 and 103,224.96

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Solution

The fourth proportional to 260,885.28, 391,106.88 and 103,224.96 is: 154,749.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,885.28 : 391,106.88 = 103,224.96 : x
  2. Step 2: Convert to fraction form
    260,885.28/391,106.88 = 103,224.96/x
  3. Step 3: Cross multiply
    260,885.28x = 391,106.88 × 103,224.96
  4. Step 4: Simplify right side
    260,885.28x = 40,371,992,043.72
  5. Step 5: Solve for x
    x = 40,371,992,043.72/260,885.28
  6. Step 6: Final answer
    x = 154,749.98

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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.