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Finding the Fourth Proportional to 309,988.71, 427,847.39 and 179,171.96

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Solution

The fourth proportional to 309,988.71, 427,847.39 and 179,171.96 is: 247,293.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,988.71 : 427,847.39 = 179,171.96 : x
  2. Step 2: Convert to fraction form
    309,988.71/427,847.39 = 179,171.96/x
  3. Step 3: Cross multiply
    309,988.71x = 427,847.39 × 179,171.96
  4. Step 4: Simplify right side
    309,988.71x = 76,658,252,412.09
  5. Step 5: Solve for x
    x = 76,658,252,412.09/309,988.71
  6. Step 6: Final answer
    x = 247,293.69

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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.