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Finding the Fourth Proportional to 305,245.20, 420,752.90 and 240,609.63

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Solution

The fourth proportional to 305,245.20, 420,752.90 and 240,609.63 is: 331,658.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,245.20 : 420,752.90 = 240,609.63 : x
  2. Step 2: Convert to fraction form
    305,245.20/420,752.90 = 240,609.63/x
  3. Step 3: Cross multiply
    305,245.20x = 420,752.90 × 240,609.63
  4. Step 4: Simplify right side
    305,245.20x = 101,237,198,387.38
  5. Step 5: Solve for x
    x = 101,237,198,387.38/305,245.20
  6. Step 6: Final answer
    x = 331,658.61

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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.