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Finding the Fourth Proportional to 281,202.10, 421,803.15 and 259,550.80

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Solution

The fourth proportional to 281,202.10, 421,803.15 and 259,550.80 is: 389,326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,202.10 : 421,803.15 = 259,550.80 : x
  2. Step 2: Convert to fraction form
    281,202.10/421,803.15 = 259,550.80/x
  3. Step 3: Cross multiply
    281,202.10x = 421,803.15 × 259,550.80
  4. Step 4: Simplify right side
    281,202.10x = 109,479,345,025.02
  5. Step 5: Solve for x
    x = 109,479,345,025.02/281,202.10
  6. Step 6: Final answer
    x = 389,326.20

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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.