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Finding the Fourth Proportional to 287,778.12, 431,791.80 and 154,502.88

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Solution

The fourth proportional to 287,778.12, 431,791.80 and 154,502.88 is: 231,821.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,778.12 : 431,791.80 = 154,502.88 : x
  2. Step 2: Convert to fraction form
    287,778.12/431,791.80 = 154,502.88/x
  3. Step 3: Cross multiply
    287,778.12x = 431,791.80 × 154,502.88
  4. Step 4: Simplify right side
    287,778.12x = 66,713,076,660.38
  5. Step 5: Solve for x
    x = 66,713,076,660.38/287,778.12
  6. Step 6: Final answer
    x = 231,821.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.