Home / 643,359.36-887,743.96-385,174.44

Finding the Fourth Proportional to 643,359.36, 887,743.96 and 385,174.44

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Solution

The fourth proportional to 643,359.36, 887,743.96 and 385,174.44 is: 531,485.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,359.36 : 887,743.96 = 385,174.44 : x
  2. Step 2: Convert to fraction form
    643,359.36/887,743.96 = 385,174.44/x
  3. Step 3: Cross multiply
    643,359.36x = 887,743.96 × 385,174.44
  4. Step 4: Simplify right side
    643,359.36x = 341,936,284,401.71
  5. Step 5: Solve for x
    x = 341,936,284,401.71/643,359.36
  6. Step 6: Final answer
    x = 531,485.68

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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.