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Finding the Fourth Proportional to 325,611.60, 487,639.80 and 199,640.40

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Solution

The fourth proportional to 325,611.60, 487,639.80 and 199,640.40 is: 298,983.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,611.60 : 487,639.80 = 199,640.40 : x
  2. Step 2: Convert to fraction form
    325,611.60/487,639.80 = 199,640.40/x
  3. Step 3: Cross multiply
    325,611.60x = 487,639.80 × 199,640.40
  4. Step 4: Simplify right side
    325,611.60x = 97,352,604,727.92
  5. Step 5: Solve for x
    x = 97,352,604,727.92/325,611.60
  6. Step 6: Final answer
    x = 298,983.83

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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.