Home / 715,806.25-987,831.49-393,524.46

Finding the Fourth Proportional to 715,806.25, 987,831.49 and 393,524.46

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Solution

The fourth proportional to 715,806.25, 987,831.49 and 393,524.46 is: 543,074.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,806.25 : 987,831.49 = 393,524.46 : x
  2. Step 2: Convert to fraction form
    715,806.25/987,831.49 = 393,524.46/x
  3. Step 3: Cross multiply
    715,806.25x = 987,831.49 × 393,524.46
  4. Step 4: Simplify right side
    715,806.25x = 388,735,853,673.25
  5. Step 5: Solve for x
    x = 388,735,853,673.25/715,806.25
  6. Step 6: Final answer
    x = 543,074.13

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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.