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Finding the Fourth Proportional to 641,840.99, 885,754.31 and 351,464.90

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Solution

The fourth proportional to 641,840.99, 885,754.31 and 351,464.90 is: 485,029.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,840.99 : 885,754.31 = 351,464.90 : x
  2. Step 2: Convert to fraction form
    641,840.99/885,754.31 = 351,464.90/x
  3. Step 3: Cross multiply
    641,840.99x = 885,754.31 × 351,464.90
  4. Step 4: Simplify right side
    641,840.99x = 311,311,543,802.62
  5. Step 5: Solve for x
    x = 311,311,543,802.62/641,840.99
  6. Step 6: Final answer
    x = 485,029.08

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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.