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Finding the Fourth Proportional to 611,776.80, 844,228.49 and 339,861.78

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Solution

The fourth proportional to 611,776.80, 844,228.49 and 339,861.78 is: 468,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,776.80 : 844,228.49 = 339,861.78 : x
  2. Step 2: Convert to fraction form
    611,776.80/844,228.49 = 339,861.78/x
  3. Step 3: Cross multiply
    611,776.80x = 844,228.49 × 339,861.78
  4. Step 4: Simplify right side
    611,776.80x = 286,920,995,638.80
  5. Step 5: Solve for x
    x = 286,920,995,638.80/611,776.80
  6. Step 6: Final answer
    x = 468,996.20

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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.