Home / 643,365.90-887,773.32-356,814.18

Finding the Fourth Proportional to 643,365.90, 887,773.32 and 356,814.18

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Solution

The fourth proportional to 643,365.90, 887,773.32 and 356,814.18 is: 492,363.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,365.90 : 887,773.32 = 356,814.18 : x
  2. Step 2: Convert to fraction form
    643,365.90/887,773.32 = 356,814.18/x
  3. Step 3: Cross multiply
    643,365.90x = 887,773.32 × 356,814.18
  4. Step 4: Simplify right side
    643,365.90x = 316,770,109,201.68
  5. Step 5: Solve for x
    x = 316,770,109,201.68/643,365.90
  6. Step 6: Final answer
    x = 492,363.85

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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.