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Finding the Fourth Proportional to 809,238.60, 1,213,857.90 and 508,744.80

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Solution

The fourth proportional to 809,238.60, 1,213,857.90 and 508,744.80 is: 763,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,238.60 : 1,213,857.90 = 508,744.80 : x
  2. Step 2: Convert to fraction form
    809,238.60/1,213,857.90 = 508,744.80/x
  3. Step 3: Cross multiply
    809,238.60x = 1,213,857.90 × 508,744.80
  4. Step 4: Simplify right side
    809,238.60x = 617,543,894,563.92
  5. Step 5: Solve for x
    x = 617,543,894,563.92/809,238.60
  6. Step 6: Final answer
    x = 763,117.20

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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.