Home / 715,936.50-987,967.08-393,644.34

Finding the Fourth Proportional to 715,936.50, 987,967.08 and 393,644.34

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Solution

The fourth proportional to 715,936.50, 987,967.08 and 393,644.34 is: 543,215.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,936.50 : 987,967.08 = 393,644.34 : x
  2. Step 2: Convert to fraction form
    715,936.50/987,967.08 = 393,644.34/x
  3. Step 3: Cross multiply
    715,936.50x = 987,967.08 × 393,644.34
  4. Step 4: Simplify right side
    715,936.50x = 388,907,649,148.33
  5. Step 5: Solve for x
    x = 388,907,649,148.33/715,936.50
  6. Step 6: Final answer
    x = 543,215.28

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1.5x scale

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.