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Finding the Fourth Proportional to 329,718.60, 494,480.70 and 129,972.60

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Solution

The fourth proportional to 329,718.60, 494,480.70 and 129,972.60 is: 194,920.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,718.60 : 494,480.70 = 129,972.60 : x
  2. Step 2: Convert to fraction form
    329,718.60/494,480.70 = 129,972.60/x
  3. Step 3: Cross multiply
    329,718.60x = 494,480.70 × 129,972.60
  4. Step 4: Simplify right side
    329,718.60x = 64,268,942,228.82
  5. Step 5: Solve for x
    x = 64,268,942,228.82/329,718.60
  6. Step 6: Final answer
    x = 194,920.58

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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.