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Finding the Fourth Proportional to 664,393.40, 996,748.49 and 215,114.41

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Solution

The fourth proportional to 664,393.40, 996,748.49 and 215,114.41 is: 322,722.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,393.40 : 996,748.49 = 215,114.41 : x
  2. Step 2: Convert to fraction form
    664,393.40/996,748.49 = 215,114.41/x
  3. Step 3: Cross multiply
    664,393.40x = 996,748.49 × 215,114.41
  4. Step 4: Simplify right side
    664,393.40x = 214,414,963,344.74
  5. Step 5: Solve for x
    x = 214,414,963,344.74/664,393.40
  6. Step 6: Final answer
    x = 322,722.90

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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.