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Finding the Fourth Proportional to 328,630.20, 492,945.30 and 118,240.80

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Solution

The fourth proportional to 328,630.20, 492,945.30 and 118,240.80 is: 177,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,630.20 : 492,945.30 = 118,240.80 : x
  2. Step 2: Convert to fraction form
    328,630.20/492,945.30 = 118,240.80/x
  3. Step 3: Cross multiply
    328,630.20x = 492,945.30 × 118,240.80
  4. Step 4: Simplify right side
    328,630.20x = 58,286,246,628.24
  5. Step 5: Solve for x
    x = 58,286,246,628.24/328,630.20
  6. Step 6: Final answer
    x = 177,361.20

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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.