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Finding the Fourth Proportional to 485,364, 728,189.64 and 248,872.62

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Solution

The fourth proportional to 485,364, 728,189.64 and 248,872.62 is: 373,382.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,364 : 728,189.64 = 248,872.62 : x
  2. Step 2: Convert to fraction form
    485,364/728,189.64 = 248,872.62/x
  3. Step 3: Cross multiply
    485,364x = 728,189.64 × 248,872.62
  4. Step 4: Simplify right side
    485,364x = 181,226,463,563.66
  5. Step 5: Solve for x
    x = 181,226,463,563.66/485,364
  6. Step 6: Final answer
    x = 373,382.58

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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.