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Finding the Fourth Proportional to 199,328.80, 298,474.80 and 128,826.40

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Solution

The fourth proportional to 199,328.80, 298,474.80 and 128,826.40 is: 192,904.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,328.80 : 298,474.80 = 128,826.40 : x
  2. Step 2: Convert to fraction form
    199,328.80/298,474.80 = 128,826.40/x
  3. Step 3: Cross multiply
    199,328.80x = 298,474.80 × 128,826.40
  4. Step 4: Simplify right side
    199,328.80x = 38,451,433,974.72
  5. Step 5: Solve for x
    x = 38,451,433,974.72/199,328.80
  6. Step 6: Final answer
    x = 192,904.56

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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.