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Finding the Fourth Proportional to 329,318.38, 493,978.78 and 80,000.38

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Solution

The fourth proportional to 329,318.38, 493,978.78 and 80,000.38 is: 120,000.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,318.38 : 493,978.78 = 80,000.38 : x
  2. Step 2: Convert to fraction form
    329,318.38/493,978.78 = 80,000.38/x
  3. Step 3: Cross multiply
    329,318.38x = 493,978.78 × 80,000.38
  4. Step 4: Simplify right side
    329,318.38x = 39,518,487,642.04
  5. Step 5: Solve for x
    x = 39,518,487,642.04/329,318.38
  6. Step 6: Final answer
    x = 120,000.86

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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.