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Finding the Fourth Proportional to 373,242.15, 515,022.30 and 220,286.79

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Solution

The fourth proportional to 373,242.15, 515,022.30 and 220,286.79 is: 303,965.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,242.15 : 515,022.30 = 220,286.79 : x
  2. Step 2: Convert to fraction form
    373,242.15/515,022.30 = 220,286.79/x
  3. Step 3: Cross multiply
    373,242.15x = 515,022.30 × 220,286.79
  4. Step 4: Simplify right side
    373,242.15x = 113,452,609,245.42
  5. Step 5: Solve for x
    x = 113,452,609,245.42/373,242.15
  6. Step 6: Final answer
    x = 303,965.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.