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Finding the Fourth Proportional to 611,891.20, 917,836.80 and 168,659.20

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Solution

The fourth proportional to 611,891.20, 917,836.80 and 168,659.20 is: 252,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,891.20 : 917,836.80 = 168,659.20 : x
  2. Step 2: Convert to fraction form
    611,891.20/917,836.80 = 168,659.20/x
  3. Step 3: Cross multiply
    611,891.20x = 917,836.80 × 168,659.20
  4. Step 4: Simplify right side
    611,891.20x = 154,801,620,418.56
  5. Step 5: Solve for x
    x = 154,801,620,418.56/611,891.20
  6. Step 6: Final answer
    x = 252,988.80

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Similar ratio
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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.