Home / 715,912.47-987,950.34-393,619.77

Finding the Fourth Proportional to 715,912.47, 987,950.34 and 393,619.77

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Solution

The fourth proportional to 715,912.47, 987,950.34 and 393,619.77 is: 543,190.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,912.47 : 987,950.34 = 393,619.77 : x
  2. Step 2: Convert to fraction form
    715,912.47/987,950.34 = 393,619.77/x
  3. Step 3: Cross multiply
    715,912.47x = 987,950.34 × 393,619.77
  4. Step 4: Simplify right side
    715,912.47x = 388,876,785,602.22
  5. Step 5: Solve for x
    x = 388,876,785,602.22/715,912.47
  6. Step 6: Final answer
    x = 543,190.41

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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.