Home / 715,815.10-987,828.23-393,546.07

Finding the Fourth Proportional to 715,815.10, 987,828.23 and 393,546.07

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Solution

The fourth proportional to 715,815.10, 987,828.23 and 393,546.07 is: 543,095.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,815.10 : 987,828.23 = 393,546.07 : x
  2. Step 2: Convert to fraction form
    715,815.10/987,828.23 = 393,546.07/x
  3. Step 3: Cross multiply
    715,815.10x = 987,828.23 × 393,546.07
  4. Step 4: Simplify right side
    715,815.10x = 388,755,917,751.56
  5. Step 5: Solve for x
    x = 388,755,917,751.56/715,815.10
  6. Step 6: Final answer
    x = 543,095.44

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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.