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Finding the Fourth Proportional to 664,986.80, 996,832.20 and 380,385.20

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Solution

The fourth proportional to 664,986.80, 996,832.20 and 380,385.20 is: 570,207.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,986.80 : 996,832.20 = 380,385.20 : x
  2. Step 2: Convert to fraction form
    664,986.80/996,832.20 = 380,385.20/x
  3. Step 3: Cross multiply
    664,986.80x = 996,832.20 × 380,385.20
  4. Step 4: Simplify right side
    664,986.80x = 379,180,215,763.44
  5. Step 5: Solve for x
    x = 379,180,215,763.44/664,986.80
  6. Step 6: Final answer
    x = 570,207.13

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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.