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Finding the Fourth Proportional to 889,791.80, 1,227,912.78 and 487,383.80

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Solution

The fourth proportional to 889,791.80, 1,227,912.78 and 487,383.80 is: 672,589.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,791.80 : 1,227,912.78 = 487,383.80 : x
  2. Step 2: Convert to fraction form
    889,791.80/1,227,912.78 = 487,383.80/x
  3. Step 3: Cross multiply
    889,791.80x = 1,227,912.78 × 487,383.80
  4. Step 4: Simplify right side
    889,791.80x = 598,464,796,784.96
  5. Step 5: Solve for x
    x = 598,464,796,784.96/889,791.80
  6. Step 6: Final answer
    x = 672,589.70

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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.