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Finding the Fourth Proportional to 618,893.49, 928,353.21 and 198,168.15

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Solution

The fourth proportional to 618,893.49, 928,353.21 and 198,168.15 is: 297,256.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,893.49 : 928,353.21 = 198,168.15 : x
  2. Step 2: Convert to fraction form
    618,893.49/928,353.21 = 198,168.15/x
  3. Step 3: Cross multiply
    618,893.49x = 928,353.21 × 198,168.15
  4. Step 4: Simplify right side
    618,893.49x = 183,970,038,172.26
  5. Step 5: Solve for x
    x = 183,970,038,172.26/618,893.49
  6. Step 6: Final answer
    x = 297,256.38

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1.5x scale

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.