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Finding the Fourth Proportional to 718,164.93, 991,067.36 and 395,880.45

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Solution

The fourth proportional to 718,164.93, 991,067.36 and 395,880.45 is: 546,314.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,164.93 : 991,067.36 = 395,880.45 : x
  2. Step 2: Convert to fraction form
    718,164.93/991,067.36 = 395,880.45/x
  3. Step 3: Cross multiply
    718,164.93x = 991,067.36 × 395,880.45
  4. Step 4: Simplify right side
    718,164.93x = 392,344,190,477.71
  5. Step 5: Solve for x
    x = 392,344,190,477.71/718,164.93
  6. Step 6: Final answer
    x = 546,314.88

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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.