Home / 806,431.80-1,209,647.70-657,132.60

Finding the Fourth Proportional to 806,431.80, 1,209,647.70 and 657,132.60

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Solution

The fourth proportional to 806,431.80, 1,209,647.70 and 657,132.60 is: 985,698.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,431.80 : 1,209,647.70 = 657,132.60 : x
  2. Step 2: Convert to fraction form
    806,431.80/1,209,647.70 = 657,132.60/x
  3. Step 3: Cross multiply
    806,431.80x = 1,209,647.70 × 657,132.60
  4. Step 4: Simplify right side
    806,431.80x = 794,898,938,185.02
  5. Step 5: Solve for x
    x = 794,898,938,185.02/806,431.80
  6. Step 6: Final answer
    x = 985,698.90

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Double scale
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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.