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Finding the Fourth Proportional to 259,226.70, 388,840.05 and 72,238.20

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Solution

The fourth proportional to 259,226.70, 388,840.05 and 72,238.20 is: 108,357.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,226.70 : 388,840.05 = 72,238.20 : x
  2. Step 2: Convert to fraction form
    259,226.70/388,840.05 = 72,238.20/x
  3. Step 3: Cross multiply
    259,226.70x = 388,840.05 × 72,238.20
  4. Step 4: Simplify right side
    259,226.70x = 28,089,105,299.91
  5. Step 5: Solve for x
    x = 28,089,105,299.91/259,226.70
  6. Step 6: Final answer
    x = 108,357.30

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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.