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Finding the Fourth Proportional to 306,239.40, 422,611.56 and 170,285.76

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Solution

The fourth proportional to 306,239.40, 422,611.56 and 170,285.76 is: 234,995.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,239.40 : 422,611.56 = 170,285.76 : x
  2. Step 2: Convert to fraction form
    306,239.40/422,611.56 = 170,285.76/x
  3. Step 3: Cross multiply
    306,239.40x = 422,611.56 × 170,285.76
  4. Step 4: Simplify right side
    306,239.40x = 71,964,730,679.39
  5. Step 5: Solve for x
    x = 71,964,730,679.39/306,239.40
  6. Step 6: Final answer
    x = 234,995.01

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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.