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Finding the Fourth Proportional to 643,755.66, 888,371.73 and 357,287.82

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Solution

The fourth proportional to 643,755.66, 888,371.73 and 357,287.82 is: 493,051.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,755.66 : 888,371.73 = 357,287.82 : x
  2. Step 2: Convert to fraction form
    643,755.66/888,371.73 = 357,287.82/x
  3. Step 3: Cross multiply
    643,755.66x = 888,371.73 × 357,287.82
  4. Step 4: Simplify right side
    643,755.66x = 317,404,398,761.33
  5. Step 5: Solve for x
    x = 317,404,398,761.33/643,755.66
  6. Step 6: Final answer
    x = 493,051.04

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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.