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Finding the Fourth Proportional to 220,365.38, 330,641.60 and 120,408.81

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Solution

The fourth proportional to 220,365.38, 330,641.60 and 120,408.81 is: 180,664.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,365.38 : 330,641.60 = 120,408.81 : x
  2. Step 2: Convert to fraction form
    220,365.38/330,641.60 = 120,408.81/x
  3. Step 3: Cross multiply
    220,365.38x = 330,641.60 × 120,408.81
  4. Step 4: Simplify right side
    220,365.38x = 39,812,160,990.45
  5. Step 5: Solve for x
    x = 39,812,160,990.45/220,365.38
  6. Step 6: Final answer
    x = 180,664.32

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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.