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Finding the Fourth Proportional to 260,814.30, 391,221.45 and 120,846.30

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Solution

The fourth proportional to 260,814.30, 391,221.45 and 120,846.30 is: 181,269.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,814.30 : 391,221.45 = 120,846.30 : x
  2. Step 2: Convert to fraction form
    260,814.30/391,221.45 = 120,846.30/x
  3. Step 3: Cross multiply
    260,814.30x = 391,221.45 × 120,846.30
  4. Step 4: Simplify right side
    260,814.30x = 47,277,664,713.14
  5. Step 5: Solve for x
    x = 47,277,664,713.14/260,814.30
  6. Step 6: Final answer
    x = 181,269.45

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1.5x scale

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.