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Finding the Fourth Proportional to 394,064.56, 543,822.12 and 215,216.56

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Solution

The fourth proportional to 394,064.56, 543,822.12 and 215,216.56 is: 297,005.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,064.56 : 543,822.12 = 215,216.56 : x
  2. Step 2: Convert to fraction form
    394,064.56/543,822.12 = 215,216.56/x
  3. Step 3: Cross multiply
    394,064.56x = 543,822.12 × 215,216.56
  4. Step 4: Simplify right side
    394,064.56x = 117,039,525,918.31
  5. Step 5: Solve for x
    x = 117,039,525,918.31/394,064.56
  6. Step 6: Final answer
    x = 297,005.97

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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.