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Finding the Fourth Proportional to 619,099.76, 928,649.64 and 408,688.40

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Solution

The fourth proportional to 619,099.76, 928,649.64 and 408,688.40 is: 613,032.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,099.76 : 928,649.64 = 408,688.40 : x
  2. Step 2: Convert to fraction form
    619,099.76/928,649.64 = 408,688.40/x
  3. Step 3: Cross multiply
    619,099.76x = 928,649.64 × 408,688.40
  4. Step 4: Simplify right side
    619,099.76x = 379,528,335,532.18
  5. Step 5: Solve for x
    x = 379,528,335,532.18/619,099.76
  6. Step 6: Final answer
    x = 613,032.60

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.