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Finding the Fourth Proportional to 621,103.20, 931,654.80 and 177,871.20

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Solution

The fourth proportional to 621,103.20, 931,654.80 and 177,871.20 is: 266,806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,103.20 : 931,654.80 = 177,871.20 : x
  2. Step 2: Convert to fraction form
    621,103.20/931,654.80 = 177,871.20/x
  3. Step 3: Cross multiply
    621,103.20x = 931,654.80 × 177,871.20
  4. Step 4: Simplify right side
    621,103.20x = 165,714,557,261.76
  5. Step 5: Solve for x
    x = 165,714,557,261.76/621,103.20
  6. Step 6: Final answer
    x = 266,806.80

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Similar ratio
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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.