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Finding the Fourth Proportional to 259,739.80, 389,609.70 and 253,907.80

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Solution

The fourth proportional to 259,739.80, 389,609.70 and 253,907.80 is: 380,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,739.80 : 389,609.70 = 253,907.80 : x
  2. Step 2: Convert to fraction form
    259,739.80/389,609.70 = 253,907.80/x
  3. Step 3: Cross multiply
    259,739.80x = 389,609.70 × 253,907.80
  4. Step 4: Simplify right side
    259,739.80x = 98,924,941,785.66
  5. Step 5: Solve for x
    x = 98,924,941,785.66/259,739.80
  6. Step 6: Final answer
    x = 380,861.70

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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.