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Finding the Fourth Proportional to 664,216.80, 996,325.20 and 214,970.55

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Solution

The fourth proportional to 664,216.80, 996,325.20 and 214,970.55 is: 322,455.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,216.80 : 996,325.20 = 214,970.55 : x
  2. Step 2: Convert to fraction form
    664,216.80/996,325.20 = 214,970.55/x
  3. Step 3: Cross multiply
    664,216.80x = 996,325.20 × 214,970.55
  4. Step 4: Simplify right side
    664,216.80x = 214,180,576,222.86
  5. Step 5: Solve for x
    x = 214,180,576,222.86/664,216.80
  6. Step 6: Final answer
    x = 322,455.83

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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.