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Finding the Fourth Proportional to 718,251.99, 991,162.23 and 391,558.25

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Solution

The fourth proportional to 718,251.99, 991,162.23 and 391,558.25 is: 540,336.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,251.99 : 991,162.23 = 391,558.25 : x
  2. Step 2: Convert to fraction form
    718,251.99/991,162.23 = 391,558.25/x
  3. Step 3: Cross multiply
    718,251.99x = 991,162.23 × 391,558.25
  4. Step 4: Simplify right side
    718,251.99x = 388,097,743,289.09
  5. Step 5: Solve for x
    x = 388,097,743,289.09/718,251.99
  6. Step 6: Final answer
    x = 540,336.47

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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.