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Finding the Fourth Proportional to 392,489.21, 541,628.55 and 220,408.76

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Solution

The fourth proportional to 392,489.21, 541,628.55 and 220,408.76 is: 304,160.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,489.21 : 541,628.55 = 220,408.76 : x
  2. Step 2: Convert to fraction form
    392,489.21/541,628.55 = 220,408.76/x
  3. Step 3: Cross multiply
    392,489.21x = 541,628.55 × 220,408.76
  4. Step 4: Simplify right side
    392,489.21x = 119,379,674,377.96
  5. Step 5: Solve for x
    x = 119,379,674,377.96/392,489.21
  6. Step 6: Final answer
    x = 304,160.40

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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.