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Finding the Fourth Proportional to 664,808.80, 996,565.20 and 380,207.20

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Solution

The fourth proportional to 664,808.80, 996,565.20 and 380,207.20 is: 569,940.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,808.80 : 996,565.20 = 380,207.20 : x
  2. Step 2: Convert to fraction form
    664,808.80/996,565.20 = 380,207.20/x
  3. Step 3: Cross multiply
    664,808.80x = 996,565.20 × 380,207.20
  4. Step 4: Simplify right side
    664,808.80x = 378,901,264,309.44
  5. Step 5: Solve for x
    x = 378,901,264,309.44/664,808.80
  6. Step 6: Final answer
    x = 569,940.21

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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.