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Finding the Fourth Proportional to 285,796.01, 428,694.20 and 72,579.91

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Solution

The fourth proportional to 285,796.01, 428,694.20 and 72,579.91 is: 108,869.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,796.01 : 428,694.20 = 72,579.91 : x
  2. Step 2: Convert to fraction form
    285,796.01/428,694.20 = 72,579.91/x
  3. Step 3: Cross multiply
    285,796.01x = 428,694.20 × 72,579.91
  4. Step 4: Simplify right side
    285,796.01x = 31,114,586,274.67
  5. Step 5: Solve for x
    x = 31,114,586,274.67/285,796.01
  6. Step 6: Final answer
    x = 108,869.91

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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.