Home / 686,540.40-1,029,810.60-213,370.80

Finding the Fourth Proportional to 686,540.40, 1,029,810.60 and 213,370.80

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Solution

The fourth proportional to 686,540.40, 1,029,810.60 and 213,370.80 is: 320,056.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,540.40 : 1,029,810.60 = 213,370.80 : x
  2. Step 2: Convert to fraction form
    686,540.40/1,029,810.60 = 213,370.80/x
  3. Step 3: Cross multiply
    686,540.40x = 1,029,810.60 × 213,370.80
  4. Step 4: Simplify right side
    686,540.40x = 219,731,511,570.48
  5. Step 5: Solve for x
    x = 219,731,511,570.48/686,540.40
  6. Step 6: Final answer
    x = 320,056.20

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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.