Home / 820,186.10-1,230,279.15-809,126.90

Finding the Fourth Proportional to 820,186.10, 1,230,279.15 and 809,126.90

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Solution

The fourth proportional to 820,186.10, 1,230,279.15 and 809,126.90 is: 1,213,690.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,186.10 : 1,230,279.15 = 809,126.90 : x
  2. Step 2: Convert to fraction form
    820,186.10/1,230,279.15 = 809,126.90/x
  3. Step 3: Cross multiply
    820,186.10x = 1,230,279.15 × 809,126.90
  4. Step 4: Simplify right side
    820,186.10x = 995,451,954,774.14
  5. Step 5: Solve for x
    x = 995,451,954,774.14/820,186.10
  6. Step 6: Final answer
    x = 1,213,690.35

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Double scale
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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.