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Finding the Fourth Proportional to 310,731.01, 428,744.41 and 181,644.42

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Solution

The fourth proportional to 310,731.01, 428,744.41 and 181,644.42 is: 250,631.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,731.01 : 428,744.41 = 181,644.42 : x
  2. Step 2: Convert to fraction form
    310,731.01/428,744.41 = 181,644.42/x
  3. Step 3: Cross multiply
    310,731.01x = 428,744.41 × 181,644.42
  4. Step 4: Simplify right side
    310,731.01x = 77,879,029,682.69
  5. Step 5: Solve for x
    x = 77,879,029,682.69/310,731.01
  6. Step 6: Final answer
    x = 250,631.66

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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.