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Finding the Fourth Proportional to 328,198.80, 492,272.60 and 128,480.40

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Solution

The fourth proportional to 328,198.80, 492,272.60 and 128,480.40 is: 192,710.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,198.80 : 492,272.60 = 128,480.40 : x
  2. Step 2: Convert to fraction form
    328,198.80/492,272.60 = 128,480.40/x
  3. Step 3: Cross multiply
    328,198.80x = 492,272.60 × 128,480.40
  4. Step 4: Simplify right side
    328,198.80x = 63,247,380,557.04
  5. Step 5: Solve for x
    x = 63,247,380,557.04/328,198.80
  6. Step 6: Final answer
    x = 192,710.58

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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.