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Finding the Fourth Proportional to 511,221.80, 766,832.70 and 137,282.60

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Solution

The fourth proportional to 511,221.80, 766,832.70 and 137,282.60 is: 205,923.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,221.80 : 766,832.70 = 137,282.60 : x
  2. Step 2: Convert to fraction form
    511,221.80/766,832.70 = 137,282.60/x
  3. Step 3: Cross multiply
    511,221.80x = 766,832.70 × 137,282.60
  4. Step 4: Simplify right side
    511,221.80x = 105,272,786,821.02
  5. Step 5: Solve for x
    x = 105,272,786,821.02/511,221.80
  6. Step 6: Final answer
    x = 205,923.90

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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.