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Finding the Fourth Proportional to 315,562.80, 472,819.32 and 221,872.08

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Solution

The fourth proportional to 315,562.80, 472,819.32 and 221,872.08 is: 332,439.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,562.80 : 472,819.32 = 221,872.08 : x
  2. Step 2: Convert to fraction form
    315,562.80/472,819.32 = 221,872.08/x
  3. Step 3: Cross multiply
    315,562.80x = 472,819.32 × 221,872.08
  4. Step 4: Simplify right side
    315,562.80x = 104,905,405,992.59
  5. Step 5: Solve for x
    x = 104,905,405,992.59/315,562.80
  6. Step 6: Final answer
    x = 332,439.08

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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.