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Finding the Fourth Proportional to 263,309.34, 394,045.47 and 215,370.30

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Solution

The fourth proportional to 263,309.34, 394,045.47 and 215,370.30 is: 322,304.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,309.34 : 394,045.47 = 215,370.30 : x
  2. Step 2: Convert to fraction form
    263,309.34/394,045.47 = 215,370.30/x
  3. Step 3: Cross multiply
    263,309.34x = 394,045.47 × 215,370.30
  4. Step 4: Simplify right side
    263,309.34x = 84,865,691,087.54
  5. Step 5: Solve for x
    x = 84,865,691,087.54/263,309.34
  6. Step 6: Final answer
    x = 322,304.14

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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.