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Finding the Fourth Proportional to 812,793.90, 1,122,198 and 506,992.98

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Solution

The fourth proportional to 812,793.90, 1,122,198 and 506,992.98 is: 699,988.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,793.90 : 1,122,198 = 506,992.98 : x
  2. Step 2: Convert to fraction form
    812,793.90/1,122,198 = 506,992.98/x
  3. Step 3: Cross multiply
    812,793.90x = 1,122,198 × 506,992.98
  4. Step 4: Simplify right side
    812,793.90x = 568,946,508,170.04
  5. Step 5: Solve for x
    x = 568,946,508,170.04/812,793.90
  6. Step 6: Final answer
    x = 699,988.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.