Home / 860,138.60-1,290,207.90-440,234.60

Finding the Fourth Proportional to 860,138.60, 1,290,207.90 and 440,234.60

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Solution

The fourth proportional to 860,138.60, 1,290,207.90 and 440,234.60 is: 660,351.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,138.60 : 1,290,207.90 = 440,234.60 : x
  2. Step 2: Convert to fraction form
    860,138.60/1,290,207.90 = 440,234.60/x
  3. Step 3: Cross multiply
    860,138.60x = 1,290,207.90 × 440,234.60
  4. Step 4: Simplify right side
    860,138.60x = 567,994,158,773.34
  5. Step 5: Solve for x
    x = 567,994,158,773.34/860,138.60
  6. Step 6: Final answer
    x = 660,351.90

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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.