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Finding the Fourth Proportional to 389,692.76, 537,623.01 and 226,321.47

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Solution

The fourth proportional to 389,692.76, 537,623.01 and 226,321.47 is: 312,234.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,692.76 : 537,623.01 = 226,321.47 : x
  2. Step 2: Convert to fraction form
    389,692.76/537,623.01 = 226,321.47/x
  3. Step 3: Cross multiply
    389,692.76x = 537,623.01 × 226,321.47
  4. Step 4: Simplify right side
    389,692.76x = 121,675,629,929.03
  5. Step 5: Solve for x
    x = 121,675,629,929.03/389,692.76
  6. Step 6: Final answer
    x = 312,234.78

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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.