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Finding the Fourth Proportional to 519,688.16, 717,664.90 and 491,384.60

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Solution

The fourth proportional to 519,688.16, 717,664.90 and 491,384.60 is: 678,579.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,688.16 : 717,664.90 = 491,384.60 : x
  2. Step 2: Convert to fraction form
    519,688.16/717,664.90 = 491,384.60/x
  3. Step 3: Cross multiply
    519,688.16x = 717,664.90 × 491,384.60
  4. Step 4: Simplify right side
    519,688.16x = 352,649,479,820.54
  5. Step 5: Solve for x
    x = 352,649,479,820.54/519,688.16
  6. Step 6: Final answer
    x = 678,579.02

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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.