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Finding the Fourth Proportional to 641,879.51, 885,804.59 and 351,486.41

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Solution

The fourth proportional to 641,879.51, 885,804.59 and 351,486.41 is: 485,057.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,879.51 : 885,804.59 = 351,486.41 : x
  2. Step 2: Convert to fraction form
    641,879.51/885,804.59 = 351,486.41/x
  3. Step 3: Cross multiply
    641,879.51x = 885,804.59 × 351,486.41
  4. Step 4: Simplify right side
    641,879.51x = 311,348,271,750.32
  5. Step 5: Solve for x
    x = 311,348,271,750.32/641,879.51
  6. Step 6: Final answer
    x = 485,057.19

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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.