Home / 715,914.42-987,941.01-393,624.18

Finding the Fourth Proportional to 715,914.42, 987,941.01 and 393,624.18

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Solution

The fourth proportional to 715,914.42, 987,941.01 and 393,624.18 is: 543,189.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,914.42 : 987,941.01 = 393,624.18 : x
  2. Step 2: Convert to fraction form
    715,914.42/987,941.01 = 393,624.18/x
  3. Step 3: Cross multiply
    715,914.42x = 987,941.01 × 393,624.18
  4. Step 4: Simplify right side
    715,914.42x = 388,877,469,949.62
  5. Step 5: Solve for x
    x = 388,877,469,949.62/715,914.42
  6. Step 6: Final answer
    x = 543,189.88

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Double scale
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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.