Home / 440,131.40-659,613.90-389,976.20

Finding the Fourth Proportional to 440,131.40, 659,613.90 and 389,976.20

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Solution

The fourth proportional to 440,131.40, 659,613.90 and 389,976.20 is: 584,447.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,131.40 : 659,613.90 = 389,976.20 : x
  2. Step 2: Convert to fraction form
    440,131.40/659,613.90 = 389,976.20/x
  3. Step 3: Cross multiply
    440,131.40x = 659,613.90 × 389,976.20
  4. Step 4: Simplify right side
    440,131.40x = 257,233,722,189.18
  5. Step 5: Solve for x
    x = 257,233,722,189.18/440,131.40
  6. Step 6: Final answer
    x = 584,447.56

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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.