Home / 715,819.76-987,806.07-393,527.49

Finding the Fourth Proportional to 715,819.76, 987,806.07 and 393,527.49

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Solution

The fourth proportional to 715,819.76, 987,806.07 and 393,527.49 is: 543,054.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,819.76 : 987,806.07 = 393,527.49 : x
  2. Step 2: Convert to fraction form
    715,819.76/987,806.07 = 393,527.49/x
  3. Step 3: Cross multiply
    715,819.76x = 987,806.07 × 393,527.49
  4. Step 4: Simplify right side
    715,819.76x = 388,728,843,333.86
  5. Step 5: Solve for x
    x = 388,728,843,333.86/715,819.76
  6. Step 6: Final answer
    x = 543,054.08

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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.