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Finding the Fourth Proportional to 382,639.30, 574,019.70 and 129,943.60

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Solution

The fourth proportional to 382,639.30, 574,019.70 and 129,943.60 is: 194,936.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,639.30 : 574,019.70 = 129,943.60 : x
  2. Step 2: Convert to fraction form
    382,639.30/574,019.70 = 129,943.60/x
  3. Step 3: Cross multiply
    382,639.30x = 574,019.70 × 129,943.60
  4. Step 4: Simplify right side
    382,639.30x = 74,590,186,288.92
  5. Step 5: Solve for x
    x = 74,590,186,288.92/382,639.30
  6. Step 6: Final answer
    x = 194,936.03

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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.