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Finding the Fourth Proportional to 331,287.20, 496,639.20 and 198,220.40

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Solution

The fourth proportional to 331,287.20, 496,639.20 and 198,220.40 is: 297,156.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,287.20 : 496,639.20 = 198,220.40 : x
  2. Step 2: Convert to fraction form
    331,287.20/496,639.20 = 198,220.40/x
  3. Step 3: Cross multiply
    331,287.20x = 496,639.20 × 198,220.40
  4. Step 4: Simplify right side
    331,287.20x = 98,444,020,879.68
  5. Step 5: Solve for x
    x = 98,444,020,879.68/331,287.20
  6. Step 6: Final answer
    x = 297,156.13

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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.