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Finding the Fourth Proportional to 260,803.80, 391,205.70 and 127,769.40

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Solution

The fourth proportional to 260,803.80, 391,205.70 and 127,769.40 is: 191,654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,803.80 : 391,205.70 = 127,769.40 : x
  2. Step 2: Convert to fraction form
    260,803.80/391,205.70 = 127,769.40/x
  3. Step 3: Cross multiply
    260,803.80x = 391,205.70 × 127,769.40
  4. Step 4: Simplify right side
    260,803.80x = 49,984,117,565.58
  5. Step 5: Solve for x
    x = 49,984,117,565.58/260,803.80
  6. Step 6: Final answer
    x = 191,654.10

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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.