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Finding the Fourth Proportional to 664,490.10, 996,832.95 and 215,061.60

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Solution

The fourth proportional to 664,490.10, 996,832.95 and 215,061.60 is: 322,624.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,490.10 : 996,832.95 = 215,061.60 : x
  2. Step 2: Convert to fraction form
    664,490.10/996,832.95 = 215,061.60/x
  3. Step 3: Cross multiply
    664,490.10x = 996,832.95 × 215,061.60
  4. Step 4: Simplify right side
    664,490.10x = 214,380,489,159.72
  5. Step 5: Solve for x
    x = 214,380,489,159.72/664,490.10
  6. Step 6: Final answer
    x = 322,624.05

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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.