Home / 860,990.70-1,291,433.76-321,142.91

Finding the Fourth Proportional to 860,990.70, 1,291,433.76 and 321,142.91

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Solution

The fourth proportional to 860,990.70, 1,291,433.76 and 321,142.91 is: 481,694.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,990.70 : 1,291,433.76 = 321,142.91 : x
  2. Step 2: Convert to fraction form
    860,990.70/1,291,433.76 = 321,142.91/x
  3. Step 3: Cross multiply
    860,990.70x = 1,291,433.76 × 321,142.91
  4. Step 4: Simplify right side
    860,990.70x = 414,734,796,565.79
  5. Step 5: Solve for x
    x = 414,734,796,565.79/860,990.70
  6. Step 6: Final answer
    x = 481,694.86

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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.