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Finding the Fourth Proportional to 353,787.20, 530,745.60 and 143,446.40

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Solution

The fourth proportional to 353,787.20, 530,745.60 and 143,446.40 is: 215,195.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,787.20 : 530,745.60 = 143,446.40 : x
  2. Step 2: Convert to fraction form
    353,787.20/530,745.60 = 143,446.40/x
  3. Step 3: Cross multiply
    353,787.20x = 530,745.60 × 143,446.40
  4. Step 4: Simplify right side
    353,787.20x = 76,133,545,635.84
  5. Step 5: Solve for x
    x = 76,133,545,635.84/353,787.20
  6. Step 6: Final answer
    x = 215,195.87

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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.