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Finding the Fourth Proportional to 618,913.16, 926,794.20 and 407,911.40

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Solution

The fourth proportional to 618,913.16, 926,794.20 and 407,911.40 is: 610,828.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,913.16 : 926,794.20 = 407,911.40 : x
  2. Step 2: Convert to fraction form
    618,913.16/926,794.20 = 407,911.40/x
  3. Step 3: Cross multiply
    618,913.16x = 926,794.20 × 407,911.40
  4. Step 4: Simplify right side
    618,913.16x = 378,049,919,633.88
  5. Step 5: Solve for x
    x = 378,049,919,633.88/618,913.16
  6. Step 6: Final answer
    x = 610,828.70

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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.