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Finding the Fourth Proportional to 889,197, 1,227,091.92 and 486,789

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Solution

The fourth proportional to 889,197, 1,227,091.92 and 486,789 is: 671,768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,197 : 1,227,091.92 = 486,789 : x
  2. Step 2: Convert to fraction form
    889,197/1,227,091.92 = 486,789/x
  3. Step 3: Cross multiply
    889,197x = 1,227,091.92 × 486,789
  4. Step 4: Simplify right side
    889,197x = 597,334,848,644.88
  5. Step 5: Solve for x
    x = 597,334,848,644.88/889,197
  6. Step 6: Final answer
    x = 671,768.85

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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.