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Finding the Fourth Proportional to 398,917.80, 598,376.70 and 379,234.80

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Solution

The fourth proportional to 398,917.80, 598,376.70 and 379,234.80 is: 568,852.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,917.80 : 598,376.70 = 379,234.80 : x
  2. Step 2: Convert to fraction form
    398,917.80/598,376.70 = 379,234.80/x
  3. Step 3: Cross multiply
    398,917.80x = 598,376.70 × 379,234.80
  4. Step 4: Simplify right side
    398,917.80x = 226,925,268,149.16
  5. Step 5: Solve for x
    x = 226,925,268,149.16/398,917.80
  6. Step 6: Final answer
    x = 568,852.20

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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.