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Finding the Fourth Proportional to 287,463.36, 430,874.26 and 127,571.78

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Solution

The fourth proportional to 287,463.36, 430,874.26 and 127,571.78 is: 191,215.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,463.36 : 430,874.26 = 127,571.78 : x
  2. Step 2: Convert to fraction form
    287,463.36/430,874.26 = 127,571.78/x
  3. Step 3: Cross multiply
    287,463.36x = 430,874.26 × 127,571.78
  4. Step 4: Simplify right side
    287,463.36x = 54,967,396,304.38
  5. Step 5: Solve for x
    x = 54,967,396,304.38/287,463.36
  6. Step 6: Final answer
    x = 191,215.31

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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.