Home / 715,918.05-987,947.96-389,220.75

Finding the Fourth Proportional to 715,918.05, 987,947.96 and 389,220.75

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Solution

The fourth proportional to 715,918.05, 987,947.96 and 389,220.75 is: 537,114.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,918.05 : 987,947.96 = 389,220.75 : x
  2. Step 2: Convert to fraction form
    715,918.05/987,947.96 = 389,220.75/x
  3. Step 3: Cross multiply
    715,918.05x = 987,947.96 × 389,220.75
  4. Step 4: Simplify right side
    715,918.05x = 384,529,844,006.07
  5. Step 5: Solve for x
    x = 384,529,844,006.07/715,918.05
  6. Step 6: Final answer
    x = 537,114.33

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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.