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Finding the Fourth Proportional to 538,336.20, 808,379.10 and 389,620.20

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Solution

The fourth proportional to 538,336.20, 808,379.10 and 389,620.20 is: 585,063.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,336.20 : 808,379.10 = 389,620.20 : x
  2. Step 2: Convert to fraction form
    538,336.20/808,379.10 = 389,620.20/x
  3. Step 3: Cross multiply
    538,336.20x = 808,379.10 × 389,620.20
  4. Step 4: Simplify right side
    538,336.20x = 314,960,826,617.82
  5. Step 5: Solve for x
    x = 314,960,826,617.82/538,336.20
  6. Step 6: Final answer
    x = 585,063.44

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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.