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Finding the Fourth Proportional to 889,189, 1,227,080.88 and 486,781

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Solution

The fourth proportional to 889,189, 1,227,080.88 and 486,781 is: 671,757.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,189 : 1,227,080.88 = 486,781 : x
  2. Step 2: Convert to fraction form
    889,189/1,227,080.88 = 486,781/x
  3. Step 3: Cross multiply
    889,189x = 1,227,080.88 × 486,781
  4. Step 4: Simplify right side
    889,189x = 597,319,657,847.28
  5. Step 5: Solve for x
    x = 597,319,657,847.28/889,189
  6. Step 6: Final answer
    x = 671,757.81

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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.