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Finding the Fourth Proportional to 886,859.10, 1,330,288.65 and 620,919.90

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Solution

The fourth proportional to 886,859.10, 1,330,288.65 and 620,919.90 is: 931,379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,859.10 : 1,330,288.65 = 620,919.90 : x
  2. Step 2: Convert to fraction form
    886,859.10/1,330,288.65 = 620,919.90/x
  3. Step 3: Cross multiply
    886,859.10x = 1,330,288.65 × 620,919.90
  4. Step 4: Simplify right side
    886,859.10x = 826,002,695,529.14
  5. Step 5: Solve for x
    x = 826,002,695,529.14/886,859.10
  6. Step 6: Final answer
    x = 931,379.85

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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.