Home / 860,820.20-1,291,230.30-261,776.60

Finding the Fourth Proportional to 860,820.20, 1,291,230.30 and 261,776.60

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Solution

The fourth proportional to 860,820.20, 1,291,230.30 and 261,776.60 is: 392,664.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,820.20 : 1,291,230.30 = 261,776.60 : x
  2. Step 2: Convert to fraction form
    860,820.20/1,291,230.30 = 261,776.60/x
  3. Step 3: Cross multiply
    860,820.20x = 1,291,230.30 × 261,776.60
  4. Step 4: Simplify right side
    860,820.20x = 338,013,877,750.98
  5. Step 5: Solve for x
    x = 338,013,877,750.98/860,820.20
  6. Step 6: Final answer
    x = 392,664.90

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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.