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Finding the Fourth Proportional to 889,187, 1,227,078.12 and 486,779

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Solution

The fourth proportional to 889,187, 1,227,078.12 and 486,779 is: 671,755.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,187 : 1,227,078.12 = 486,779 : x
  2. Step 2: Convert to fraction form
    889,187/1,227,078.12 = 486,779/x
  3. Step 3: Cross multiply
    889,187x = 1,227,078.12 × 486,779
  4. Step 4: Simplify right side
    889,187x = 597,315,860,175.48
  5. Step 5: Solve for x
    x = 597,315,860,175.48/889,187
  6. Step 6: Final answer
    x = 671,755.05

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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.