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Finding the Fourth Proportional to 664,483.70, 996,871.35 and 215,128.10

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Solution

The fourth proportional to 664,483.70, 996,871.35 and 215,128.10 is: 322,739.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,483.70 : 996,871.35 = 215,128.10 : x
  2. Step 2: Convert to fraction form
    664,483.70/996,871.35 = 215,128.10/x
  3. Step 3: Cross multiply
    664,483.70x = 996,871.35 × 215,128.10
  4. Step 4: Simplify right side
    664,483.70x = 214,455,039,469.94
  5. Step 5: Solve for x
    x = 214,455,039,469.94/664,483.70
  6. Step 6: Final answer
    x = 322,739.35

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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.