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Finding the Fourth Proportional to 718,690.41, 991,797.48 and 396,409.23

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Solution

The fourth proportional to 718,690.41, 991,797.48 and 396,409.23 is: 547,047.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,690.41 : 991,797.48 = 396,409.23 : x
  2. Step 2: Convert to fraction form
    718,690.41/991,797.48 = 396,409.23/x
  3. Step 3: Cross multiply
    718,690.41x = 991,797.48 × 396,409.23
  4. Step 4: Simplify right side
    718,690.41x = 393,157,675,362.74
  5. Step 5: Solve for x
    x = 393,157,675,362.74/718,690.41
  6. Step 6: Final answer
    x = 547,047.34

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Double scale
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Similar ratio
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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.