Home / 715,832.85-987,849.95-393,548.43

Finding the Fourth Proportional to 715,832.85, 987,849.95 and 393,548.43

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Solution

The fourth proportional to 715,832.85, 987,849.95 and 393,548.43 is: 543,097.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,832.85 : 987,849.95 = 393,548.43 : x
  2. Step 2: Convert to fraction form
    715,832.85/987,849.95 = 393,548.43/x
  3. Step 3: Cross multiply
    715,832.85x = 987,849.95 × 393,548.43
  4. Step 4: Simplify right side
    715,832.85x = 388,766,794,930.34
  5. Step 5: Solve for x
    x = 388,766,794,930.34/715,832.85
  6. Step 6: Final answer
    x = 543,097.17

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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.