Home / 715,920.06-987,972.21-393,650.43

Finding the Fourth Proportional to 715,920.06, 987,972.21 and 393,650.43

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Solution

The fourth proportional to 715,920.06, 987,972.21 and 393,650.43 is: 543,238.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,920.06 : 987,972.21 = 393,650.43 : x
  2. Step 2: Convert to fraction form
    715,920.06/987,972.21 = 393,650.43/x
  3. Step 3: Cross multiply
    715,920.06x = 987,972.21 × 393,650.43
  4. Step 4: Simplify right side
    715,920.06x = 388,915,680,354.69
  5. Step 5: Solve for x
    x = 388,915,680,354.69/715,920.06
  6. Step 6: Final answer
    x = 543,238.98

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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.