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Finding the Fourth Proportional to 313,239.80, 432,047.63 and 287,481.32

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Solution

The fourth proportional to 313,239.80, 432,047.63 and 287,481.32 is: 396,519.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,239.80 : 432,047.63 = 287,481.32 : x
  2. Step 2: Convert to fraction form
    313,239.80/432,047.63 = 287,481.32/x
  3. Step 3: Cross multiply
    313,239.80x = 432,047.63 × 287,481.32
  4. Step 4: Simplify right side
    313,239.80x = 124,205,622,975.27
  5. Step 5: Solve for x
    x = 124,205,622,975.27/313,239.80
  6. Step 6: Final answer
    x = 396,519.29

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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.