Home / 715,927.41-987,953.27-393,618.33

Finding the Fourth Proportional to 715,927.41, 987,953.27 and 393,618.33

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Solution

The fourth proportional to 715,927.41, 987,953.27 and 393,618.33 is: 543,178.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,927.41 : 987,953.27 = 393,618.33 : x
  2. Step 2: Convert to fraction form
    715,927.41/987,953.27 = 393,618.33/x
  3. Step 3: Cross multiply
    715,927.41x = 987,953.27 × 393,618.33
  4. Step 4: Simplify right side
    715,927.41x = 388,876,514,287.35
  5. Step 5: Solve for x
    x = 388,876,514,287.35/715,927.41
  6. Step 6: Final answer
    x = 543,178.69

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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.