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Finding the Fourth Proportional to 611,821, 844,336.79 and 418,633.74

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Solution

The fourth proportional to 611,821, 844,336.79 and 418,633.74 is: 577,730.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,821 : 844,336.79 = 418,633.74 : x
  2. Step 2: Convert to fraction form
    611,821/844,336.79 = 418,633.74/x
  3. Step 3: Cross multiply
    611,821x = 844,336.79 × 418,633.74
  4. Step 4: Simplify right side
    611,821x = 353,467,868,217.30
  5. Step 5: Solve for x
    x = 353,467,868,217.30/611,821
  6. Step 6: Final answer
    x = 577,730.85

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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.