Home / 715,927.16-987,952.92-393,618.08

Finding the Fourth Proportional to 715,927.16, 987,952.92 and 393,618.08

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Solution

The fourth proportional to 715,927.16, 987,952.92 and 393,618.08 is: 543,178.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,927.16 : 987,952.92 = 393,618.08 : x
  2. Step 2: Convert to fraction form
    715,927.16/987,952.92 = 393,618.08/x
  3. Step 3: Cross multiply
    715,927.16x = 987,952.92 × 393,618.08
  4. Step 4: Simplify right side
    715,927.16x = 388,876,131,500.79
  5. Step 5: Solve for x
    x = 388,876,131,500.79/715,927.16
  6. Step 6: Final answer
    x = 543,178.35

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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.