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Finding the Fourth Proportional to 259,631.20, 389,446.80 and 170,984.80

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Solution

The fourth proportional to 259,631.20, 389,446.80 and 170,984.80 is: 256,477.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,631.20 : 389,446.80 = 170,984.80 : x
  2. Step 2: Convert to fraction form
    259,631.20/389,446.80 = 170,984.80/x
  3. Step 3: Cross multiply
    259,631.20x = 389,446.80 × 170,984.80
  4. Step 4: Simplify right side
    259,631.20x = 66,589,483,208.64
  5. Step 5: Solve for x
    x = 66,589,483,208.64/259,631.20
  6. Step 6: Final answer
    x = 256,477.20

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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.