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Finding the Fourth Proportional to 330,543.41, 495,815.22 and 90,659.81

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Solution

The fourth proportional to 330,543.41, 495,815.22 and 90,659.81 is: 135,989.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,543.41 : 495,815.22 = 90,659.81 : x
  2. Step 2: Convert to fraction form
    330,543.41/495,815.22 = 90,659.81/x
  3. Step 3: Cross multiply
    330,543.41x = 495,815.22 × 90,659.81
  4. Step 4: Simplify right side
    330,543.41x = 44,950,511,161.23
  5. Step 5: Solve for x
    x = 44,950,511,161.23/330,543.41
  6. Step 6: Final answer
    x = 135,989.74

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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.