Home / 858,734.10-1,288,101.15-660,057.30

Finding the Fourth Proportional to 858,734.10, 1,288,101.15 and 660,057.30

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Solution

The fourth proportional to 858,734.10, 1,288,101.15 and 660,057.30 is: 990,085.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,734.10 : 1,288,101.15 = 660,057.30 : x
  2. Step 2: Convert to fraction form
    858,734.10/1,288,101.15 = 660,057.30/x
  3. Step 3: Cross multiply
    858,734.10x = 1,288,101.15 × 660,057.30
  4. Step 4: Simplify right side
    858,734.10x = 850,220,567,195.90
  5. Step 5: Solve for x
    x = 850,220,567,195.90/858,734.10
  6. Step 6: Final answer
    x = 990,085.95

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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.