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Finding the Fourth Proportional to 664,289.80, 996,531.90 and 214,934.20

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Solution

The fourth proportional to 664,289.80, 996,531.90 and 214,934.20 is: 322,432.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,289.80 : 996,531.90 = 214,934.20 : x
  2. Step 2: Convert to fraction form
    664,289.80/996,531.90 = 214,934.20/x
  3. Step 3: Cross multiply
    664,289.80x = 996,531.90 × 214,934.20
  4. Step 4: Simplify right side
    664,289.80x = 214,188,786,700.98
  5. Step 5: Solve for x
    x = 214,188,786,700.98/664,289.80
  6. Step 6: Final answer
    x = 322,432.75

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Double scale
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Similar ratio
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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.