Home / 715,839.63-987,849.81-393,546.90

Finding the Fourth Proportional to 715,839.63, 987,849.81 and 393,546.90

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Solution

The fourth proportional to 715,839.63, 987,849.81 and 393,546.90 is: 543,089.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,839.63 : 987,849.81 = 393,546.90 : x
  2. Step 2: Convert to fraction form
    715,839.63/987,849.81 = 393,546.90/x
  3. Step 3: Cross multiply
    715,839.63x = 987,849.81 × 393,546.90
  4. Step 4: Simplify right side
    715,839.63x = 388,765,234,095.53
  5. Step 5: Solve for x
    x = 388,765,234,095.53/715,839.63
  6. Step 6: Final answer
    x = 543,089.85

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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.