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Finding the Fourth Proportional to 218,411.80, 327,617.70 and 129,619.60

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Solution

The fourth proportional to 218,411.80, 327,617.70 and 129,619.60 is: 194,429.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,411.80 : 327,617.70 = 129,619.60 : x
  2. Step 2: Convert to fraction form
    218,411.80/327,617.70 = 129,619.60/x
  3. Step 3: Cross multiply
    218,411.80x = 327,617.70 × 129,619.60
  4. Step 4: Simplify right side
    218,411.80x = 42,465,675,226.92
  5. Step 5: Solve for x
    x = 42,465,675,226.92/218,411.80
  6. Step 6: Final answer
    x = 194,429.40

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1.5x scale

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.