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Finding the Fourth Proportional to 198,390.15, 297,604.85 and 65,216.43

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Solution

The fourth proportional to 198,390.15, 297,604.85 and 65,216.43 is: 97,831.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,390.15 : 297,604.85 = 65,216.43 : x
  2. Step 2: Convert to fraction form
    198,390.15/297,604.85 = 65,216.43/x
  3. Step 3: Cross multiply
    198,390.15x = 297,604.85 × 65,216.43
  4. Step 4: Simplify right side
    198,390.15x = 19,408,725,541.60
  5. Step 5: Solve for x
    x = 19,408,725,541.60/198,390.15
  6. Step 6: Final answer
    x = 97,831.09

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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.