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Finding the Fourth Proportional to 860,164.60, 1,290,246.90 and 807,676.60

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Solution

The fourth proportional to 860,164.60, 1,290,246.90 and 807,676.60 is: 1,211,514.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,164.60 : 1,290,246.90 = 807,676.60 : x
  2. Step 2: Convert to fraction form
    860,164.60/1,290,246.90 = 807,676.60/x
  3. Step 3: Cross multiply
    860,164.60x = 1,290,246.90 × 807,676.60
  4. Step 4: Simplify right side
    860,164.60x = 1,042,102,229,352.54
  5. Step 5: Solve for x
    x = 1,042,102,229,352.54/860,164.60
  6. Step 6: Final answer
    x = 1,211,514.90

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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.