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Finding the Fourth Proportional to 618,711.21, 853,844.90 and 346,784.09

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Solution

The fourth proportional to 618,711.21, 853,844.90 and 346,784.09 is: 478,575.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,711.21 : 853,844.90 = 346,784.09 : x
  2. Step 2: Convert to fraction form
    618,711.21/853,844.90 = 346,784.09/x
  3. Step 3: Cross multiply
    618,711.21x = 853,844.90 × 346,784.09
  4. Step 4: Simplify right side
    618,711.21x = 296,099,820,644.50
  5. Step 5: Solve for x
    x = 296,099,820,644.50/618,711.21
  6. Step 6: Final answer
    x = 478,575.17

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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.