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Finding the Fourth Proportional to 618,665.36, 853,818.12 and 346,779.44

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Solution

The fourth proportional to 618,665.36, 853,818.12 and 346,779.44 is: 478,589.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,665.36 : 853,818.12 = 346,779.44 : x
  2. Step 2: Convert to fraction form
    618,665.36/853,818.12 = 346,779.44/x
  3. Step 3: Cross multiply
    618,665.36x = 853,818.12 × 346,779.44
  4. Step 4: Simplify right side
    618,665.36x = 296,086,569,515.45
  5. Step 5: Solve for x
    x = 296,086,569,515.45/618,665.36
  6. Step 6: Final answer
    x = 478,589.22

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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.