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Finding the Fourth Proportional to 322,435.98, 483,653.39 and 85,778.66

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Solution

The fourth proportional to 322,435.98, 483,653.39 and 85,778.66 is: 128,667.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,435.98 : 483,653.39 = 85,778.66 : x
  2. Step 2: Convert to fraction form
    322,435.98/483,653.39 = 85,778.66/x
  3. Step 3: Cross multiply
    322,435.98x = 483,653.39 × 85,778.66
  4. Step 4: Simplify right side
    322,435.98x = 41,487,137,280.39
  5. Step 5: Solve for x
    x = 41,487,137,280.39/322,435.98
  6. Step 6: Final answer
    x = 128,667.83

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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.