Home / 782,457.30-1,174,121.92-422,620.86

Finding the Fourth Proportional to 782,457.30, 1,174,121.92 and 422,620.86

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Solution

The fourth proportional to 782,457.30, 1,174,121.92 and 422,620.86 is: 634,166.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,457.30 : 1,174,121.92 = 422,620.86 : x
  2. Step 2: Convert to fraction form
    782,457.30/1,174,121.92 = 422,620.86/x
  3. Step 3: Cross multiply
    782,457.30x = 1,174,121.92 × 422,620.86
  4. Step 4: Simplify right side
    782,457.30x = 496,208,415,575.25
  5. Step 5: Solve for x
    x = 496,208,415,575.25/782,457.30
  6. Step 6: Final answer
    x = 634,166.77

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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.