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Finding the Fourth Proportional to 328,721.28, 492,787.08 and 118,212

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Solution

The fourth proportional to 328,721.28, 492,787.08 and 118,212 is: 177,211.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,721.28 : 492,787.08 = 118,212 : x
  2. Step 2: Convert to fraction form
    328,721.28/492,787.08 = 118,212/x
  3. Step 3: Cross multiply
    328,721.28x = 492,787.08 × 118,212
  4. Step 4: Simplify right side
    328,721.28x = 58,253,346,300.96
  5. Step 5: Solve for x
    x = 58,253,346,300.96/328,721.28
  6. Step 6: Final answer
    x = 177,211.97

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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.