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Finding the Fourth Proportional to 308,902.40, 426,297.60 and 189,708.80

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Solution

The fourth proportional to 308,902.40, 426,297.60 and 189,708.80 is: 261,805.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,902.40 : 426,297.60 = 189,708.80 : x
  2. Step 2: Convert to fraction form
    308,902.40/426,297.60 = 189,708.80/x
  3. Step 3: Cross multiply
    308,902.40x = 426,297.60 × 189,708.80
  4. Step 4: Simplify right side
    308,902.40x = 80,872,406,138.88
  5. Step 5: Solve for x
    x = 80,872,406,138.88/308,902.40
  6. Step 6: Final answer
    x = 261,805.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.