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Finding the Fourth Proportional to 618,000.20, 867,688.60 and 618,000.20

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Solution

The fourth proportional to 618,000.20, 867,688.60 and 618,000.20 is: 867,688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,000.20 : 867,688.60 = 618,000.20 : x
  2. Step 2: Convert to fraction form
    618,000.20/867,688.60 = 618,000.20/x
  3. Step 3: Cross multiply
    618,000.20x = 867,688.60 × 618,000.20
  4. Step 4: Simplify right side
    618,000.20x = 536,231,728,337.72
  5. Step 5: Solve for x
    x = 536,231,728,337.72/618,000.20
  6. Step 6: Final answer
    x = 867,688.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.