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Finding the Fourth Proportional to 610,639.72, 915,961.92 and 255,404.54

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Solution

The fourth proportional to 610,639.72, 915,961.92 and 255,404.54 is: 383,107.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,639.72 : 915,961.92 = 255,404.54 : x
  2. Step 2: Convert to fraction form
    610,639.72/915,961.92 = 255,404.54/x
  3. Step 3: Cross multiply
    610,639.72x = 915,961.92 × 255,404.54
  4. Step 4: Simplify right side
    610,639.72x = 233,940,831,558.09
  5. Step 5: Solve for x
    x = 233,940,831,558.09/610,639.72
  6. Step 6: Final answer
    x = 383,107.79

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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.