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Finding the Fourth Proportional to 519,156.72, 716,760.60 and 398,065.26

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Solution

The fourth proportional to 519,156.72, 716,760.60 and 398,065.26 is: 549,578.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,156.72 : 716,760.60 = 398,065.26 : x
  2. Step 2: Convert to fraction form
    519,156.72/716,760.60 = 398,065.26/x
  3. Step 3: Cross multiply
    519,156.72x = 716,760.60 × 398,065.26
  4. Step 4: Simplify right side
    519,156.72x = 285,317,494,596.76
  5. Step 5: Solve for x
    x = 285,317,494,596.76/519,156.72
  6. Step 6: Final answer
    x = 549,578.74

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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.