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Finding the Fourth Proportional to 387,891.45, 582,001.20 and 245,845.80

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Solution

The fourth proportional to 387,891.45, 582,001.20 and 245,845.80 is: 368,872.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,891.45 : 582,001.20 = 245,845.80 : x
  2. Step 2: Convert to fraction form
    387,891.45/582,001.20 = 245,845.80/x
  3. Step 3: Cross multiply
    387,891.45x = 582,001.20 × 245,845.80
  4. Step 4: Simplify right side
    387,891.45x = 143,082,550,614.96
  5. Step 5: Solve for x
    x = 143,082,550,614.96/387,891.45
  6. Step 6: Final answer
    x = 368,872.66

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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.