Home / 715,800.87-987,824.07-393,519.06

Finding the Fourth Proportional to 715,800.87, 987,824.07 and 393,519.06

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Solution

The fourth proportional to 715,800.87, 987,824.07 and 393,519.06 is: 543,066.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,800.87 : 987,824.07 = 393,519.06 : x
  2. Step 2: Convert to fraction form
    715,800.87/987,824.07 = 393,519.06/x
  3. Step 3: Cross multiply
    715,800.87x = 987,824.07 × 393,519.06
  4. Step 4: Simplify right side
    715,800.87x = 388,727,599,471.77
  5. Step 5: Solve for x
    x = 388,727,599,471.77/715,800.87
  6. Step 6: Final answer
    x = 543,066.68

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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.