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Finding the Fourth Proportional to 500,806.08, 691,149.84 and 309,930.48

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Solution

The fourth proportional to 500,806.08, 691,149.84 and 309,930.48 is: 427,727.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,806.08 : 691,149.84 = 309,930.48 : x
  2. Step 2: Convert to fraction form
    500,806.08/691,149.84 = 309,930.48/x
  3. Step 3: Cross multiply
    500,806.08x = 691,149.84 × 309,930.48
  4. Step 4: Simplify right side
    500,806.08x = 214,208,401,663.12
  5. Step 5: Solve for x
    x = 214,208,401,663.12/500,806.08
  6. Step 6: Final answer
    x = 427,727.24

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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.