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Finding the Fourth Proportional to 664,480.80, 996,721.20 and 379,879.20

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Solution

The fourth proportional to 664,480.80, 996,721.20 and 379,879.20 is: 569,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,480.80 : 996,721.20 = 379,879.20 : x
  2. Step 2: Convert to fraction form
    664,480.80/996,721.20 = 379,879.20/x
  3. Step 3: Cross multiply
    664,480.80x = 996,721.20 × 379,879.20
  4. Step 4: Simplify right side
    664,480.80x = 378,633,652,079.04
  5. Step 5: Solve for x
    x = 378,633,652,079.04/664,480.80
  6. Step 6: Final answer
    x = 569,818.80

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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.