Home / 860,813.70-1,291,220.55-261,770.10

Finding the Fourth Proportional to 860,813.70, 1,291,220.55 and 261,770.10

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Solution

The fourth proportional to 860,813.70, 1,291,220.55 and 261,770.10 is: 392,655.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,813.70 : 1,291,220.55 = 261,770.10 : x
  2. Step 2: Convert to fraction form
    860,813.70/1,291,220.55 = 261,770.10/x
  3. Step 3: Cross multiply
    860,813.70x = 1,291,220.55 × 261,770.10
  4. Step 4: Simplify right side
    860,813.70x = 338,002,932,495.56
  5. Step 5: Solve for x
    x = 338,002,932,495.56/860,813.70
  6. Step 6: Final answer
    x = 392,655.15

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Half scale
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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.