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Finding the Fourth Proportional to 329,183.70, 493,479.90 and 129,640.20

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Solution

The fourth proportional to 329,183.70, 493,479.90 and 129,640.20 is: 194,343.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,183.70 : 493,479.90 = 129,640.20 : x
  2. Step 2: Convert to fraction form
    329,183.70/493,479.90 = 129,640.20/x
  3. Step 3: Cross multiply
    329,183.70x = 493,479.90 × 129,640.20
  4. Step 4: Simplify right side
    329,183.70x = 63,974,832,931.98
  5. Step 5: Solve for x
    x = 63,974,832,931.98/329,183.70
  6. Step 6: Final answer
    x = 194,343.87

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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.